: "Pharm Dev Technol. 2005 ;10:17-32 [Pubmed] [Scholar] [Select] [Drop] [Hide] [Show]
The nonsteady state modeling of freeze drying: in-process product temperature and moisture content mapping and pharmaceutical product quality applications.
M J Pikal, S Cardon, Chandan Bhugra, F Jameel, S Rambhatla, W J Mascarenhas, H U Akay
INTRODUCTION: Theoretical models of the freeze-drying process are potentially useful to guide the design of a freeze-drying process as well as to obtain information not readily accessible by direct experimentation, such as moisture distribution and glass transition temperature, Tg, within a vial during processing. Previous models were either restricted to the steady state and/or to one-dimensional problems. While such models are useful, the restrictions seriously limit applications of the theory. An earlier work from these laboratories presented a nonsteady state, two-dimensional model (which becomes a three-dimensional model with an axis of symmetry) of sublimation and desorption that is quite versatile and allows the user to investigate a wide variety of heat and mass transfer problems in both primary and secondary drying. The earlier treatment focused on the mathematical details of the finite element formulation of the problem and on validation of the calculations. The objective of the current study is to provide the physical rational for the choice of boundary conditions, to validate the model by comparison of calculated results with experimental data, and to discuss several representative pharmaceutical applications. To validate the model and evaluate its utility in studying distribution of moisture and glass transition temperature in a representative product, calculations for a sucrose-based formulation were performed, and selected results were compared with experimental data. THEORETICAL MODEL: The mod"
Friday, October 20, 2006
Tuesday, October 03, 2006
Casting Software
Casting Software: "PASSAGE®/PowerCAST Software is a 3-D Finite Element program for predicting the manufacturability of cast parts.
Convective and conductive energy equations, and the Navier-Stokes equations are solved for the filling and solidification processes, allowing engineers to analyze design parameters from concept to production without being finite element experts.
A user-friendly, pre-processor with mesh generation and capability to read meshes from other mesh generation codes, permits the entering of material properties, process conditions and numerical control parameters interactively.
The interactive, dynamic postprocessor displays interpreted color graphics of standard casting variables in contour, vector and x-y graph forms.
Features
Coupled flow and energy equations.
Prediction of temperature distribution of the casting and mold at every time step.
Prediction of solid/liquid fractions.
Prediction of porosity/shrinkage.
Hot cracking prediction.
Convection/diffusion phase-change: solid, liquid and mush regions.
Interface with thermal stress analysis programs for: elastic and thermal strains.
Interface with stress analysis for structural integrity of parts under external static and dynamic loads.
Materials database - metals, cores, risers and sand types.
Provides mesh generator, a 3-D CAD interface module, and accepts meshes from other mesh generators
Convective and conductive energy equations, and the Navier-Stokes equations are solved for the filling and solidification processes, allowing engineers to analyze design parameters from concept to production without being finite element experts.
A user-friendly, pre-processor with mesh generation and capability to read meshes from other mesh generation codes, permits the entering of material properties, process conditions and numerical control parameters interactively.
The interactive, dynamic postprocessor displays interpreted color graphics of standard casting variables in contour, vector and x-y graph forms.
Features
Coupled flow and energy equations.
Prediction of temperature distribution of the casting and mold at every time step.
Prediction of solid/liquid fractions.
Prediction of porosity/shrinkage.
Hot cracking prediction.
Convection/diffusion phase-change: solid, liquid and mush regions.
Interface with thermal stress analysis programs for: elastic and thermal strains.
Interface with stress analysis for structural integrity of parts under external static and dynamic loads.
Materials database - metals, cores, risers and sand types.
Provides mesh generator, a 3-D CAD interface module, and accepts meshes from other mesh generators
Wednesday, September 27, 2006
Thursday, September 21, 2006
CAE Software - Freeze Drying Software
CAE Software - Freeze Drying Software: "Benefits of Freeze Drying SoftwareProvide a tool to predict drying times and process conditions to alleviate 'islands of ice' and glassing of product
Results can be used for FDA process approval
Minimize cost of testing and shorten drying time to increase yield
Provide detailed understanding of primary and secondary drying processes "
Results can be used for FDA process approval
Minimize cost of testing and shorten drying time to increase yield
Provide detailed understanding of primary and secondary drying processes "
Discrete Element Modeling - Passage DEM Software- Particle Flow Simulation
Discrete Element Modeling - Passage DEM Software- Particle Flow Simulation: "Passage® Discrete Element Method Software
Some application areas for Passage discrete element modelling (DEM) program
Computers
Printers
Pharmaceutical Processes
Food Processing
Material Processing
Mixing Problems
Custom software"
Some application areas for Passage discrete element modelling (DEM) program
Computers
Printers
Pharmaceutical Processes
Food Processing
Material Processing
Mixing Problems
Custom software"
Tuesday, September 19, 2006
Entrez PubMed
Entrez PubMed: "Computational fluid dynamics modeling of intracranial aneurysms: effects of parent artery segmentation on intra-aneurysmal hemodynamics.
Castro MA, Putman CM, Cebral JR.
School of Computational Sciences, George Mason University, Fairfax, Va.
PURPOSE: The purpose of this study is to show the influence of the upstream parent artery geometry on intraaneurysmal hemodynamics of cerebral aneurysms. METHODS: Patient-specific models of 4 cerebral aneurysms (1 posterior communicating artery [PcomA], 2 middle cerebral artery [MCA], and 1 anterior communicating artery [AcomA]) were constructed from 3D rotational angiography images. Two geometric models were constructed for each aneurysm. One model had the native parent vessel geometry; the second model was truncated approximately 1 cm upstream from the aneurysm, and the parent artery replaced with a straight cylinder. Corresponding finite element grids were generated and computational fluid dynamics simulations were carried out under pulsatile flow conditions. The intra-aneurysmal flow patterns and wall shear stress (WSS) distributions were visualized and compared. RESULTS: Models using the truncated parent vessel underestimated the WSS in the aneurysms in all cases and shifted the impaction zone to the neck compared with the native geometry. These effects were more pronounced in the PcomA and AcomA aneurysms where upstream curvature was substantial. The MCA aneurysm with a long M1 segment was the least effected. The more laminar flow pattern within the parent vessel in truncated models resulted in a less complex intra-aneurysmal flow patterns with fewer vortices and less velocity at the dome. CONCLUSIONS: Failure to properly model the inflow stream contributed by the upstream parent "
Castro MA, Putman CM, Cebral JR.
School of Computational Sciences, George Mason University, Fairfax, Va.
PURPOSE: The purpose of this study is to show the influence of the upstream parent artery geometry on intraaneurysmal hemodynamics of cerebral aneurysms. METHODS: Patient-specific models of 4 cerebral aneurysms (1 posterior communicating artery [PcomA], 2 middle cerebral artery [MCA], and 1 anterior communicating artery [AcomA]) were constructed from 3D rotational angiography images. Two geometric models were constructed for each aneurysm. One model had the native parent vessel geometry; the second model was truncated approximately 1 cm upstream from the aneurysm, and the parent artery replaced with a straight cylinder. Corresponding finite element grids were generated and computational fluid dynamics simulations were carried out under pulsatile flow conditions. The intra-aneurysmal flow patterns and wall shear stress (WSS) distributions were visualized and compared. RESULTS: Models using the truncated parent vessel underestimated the WSS in the aneurysms in all cases and shifted the impaction zone to the neck compared with the native geometry. These effects were more pronounced in the PcomA and AcomA aneurysms where upstream curvature was substantial. The MCA aneurysm with a long M1 segment was the least effected. The more laminar flow pattern within the parent vessel in truncated models resulted in a less complex intra-aneurysmal flow patterns with fewer vortices and less velocity at the dome. CONCLUSIONS: Failure to properly model the inflow stream contributed by the upstream parent "
Monday, September 18, 2006
Entrez PubMed
Entrez PubMed
The nonsteady state modeling of freeze drying: in-process product temperature and moisture content mapping and pharmaceutical product quality applications.
The nonsteady state modeling of freeze drying: in-process product temperature and moisture content mapping and pharmaceutical product quality applications.
Customized Software Development - Custom CAE Software by Technalysis
Customized Software Development - Custom CAE Software by Technalysis: "Software Development Technalysis' Passage Software has been used within wide variety of industry applications. However, Technalysis can customize its Passage Program to specific needs. Technalysis has over 20 years of experience developing, customizing and supporting software for many specific applications.
Please contact us to discuss your needs.
Technalysis, Inc
7116 Zionsville Road
Indianapolis, IN 46268
Telephone: 317-291-1985
Fax: 317-291-7281
Contact Technalysis for CAE development needs.
Technalysis brochure "
Please contact us to discuss your needs.
Technalysis, Inc
7116 Zionsville Road
Indianapolis, IN 46268
Telephone: 317-291-1985
Fax: 317-291-7281
Contact Technalysis for CAE development needs.
Technalysis brochure "
1D System Analysis and Design - Fluid Flow Modeling - Fluid Flow Modeling Software - Network Performance.
1D System Analysis and Design - Fluid Flow Modeling - Fluid Flow Modeling Software - Network Performance.: "PASSAGE®/SYSFLOW Program is fast, user-friendly and effectively predicts performance in a variety of user-defined networks.
Steady state, compressible and incompressible flow network problems can be solved including heat transfer effects.
Virtually any flow network system and/or sub-system can be modeled using combinations of components included in the standard library.
A numerical model such as PASSAGE®/SYSFLOW design and analysis tool serves as an invaluable tool to study the flow and heat-transfer in complex systems and to optimize the design process in a more cost effective and timely fashion.
PASSAGE®/ Sysflow brochure"
Steady state, compressible and incompressible flow network problems can be solved including heat transfer effects.
Virtually any flow network system and/or sub-system can be modeled using combinations of components included in the standard library.
A numerical model such as PASSAGE®/SYSFLOW design and analysis tool serves as an invaluable tool to study the flow and heat-transfer in complex systems and to optimize the design process in a more cost effective and timely fashion.
PASSAGE®/ Sysflow brochure"
Tuesday, September 12, 2006
Benefits of Coupled 1D-3D Analysis
Advantage of Technalysis' System and Component Level Analysis Approach
Entire system can be easily and quickly modeled and modified using Passage 1D.
The models can be created early in the design cycle to detect potential problems.
A sensitivity analysis can be performed to determine the critical parameters and improve system level performance.
Passage Flow or any other Passage 3D software can be used to do further analysis to improve specific component performance, understand and visualize complex flow behavior and solve any flow and heat transfer problems.
Entire system can be easily and quickly modeled and modified using Passage 1D.
The models can be created early in the design cycle to detect potential problems.
A sensitivity analysis can be performed to determine the critical parameters and improve system level performance.
Passage Flow or any other Passage 3D software can be used to do further analysis to improve specific component performance, understand and visualize complex flow behavior and solve any flow and heat transfer problems.
Discrete element method - Wikipedia, the free encyclopedia
Discrete element method - Wikipedia, the free encyclopedia
Discrete element method
From Wikipedia, the free encyclopedia
Jump to: navigation, search
The term discrete element method (DEM) is a family of numerical methods for computing the motion of a large number of particles like molecules or grains of sand. The method was originally applied by Cundall in 1971 to problems in rock mechanics. The theoretical basis of the method was detailed by Williams, Hocking, and Mustoe in 1985 who showed that DEM could be viewed as a generalized finite element method. Its applications to geomechanics problems is described in the book Numerical Modeling in Rock Mechanics, by Pande, G., Beer, G. and Williams, J.R.. Good sources detailing research in the area are to be found in the 1st, 2nd and 3rd International Conferences on Discrete Element Methods. Journal articles reviewing the state of the art have been published by Williams, and Bicanic (see below). A comprehensive treatment of the combined Finite Element-Discrete Element Method is contained in the book The Combined Finite-Discrete Element Method by Munjiza. The method is sometimes called molecular dynamics (MD), even when the particles are not molecules. However, in contrast to molecular dynamics the method can be used to model particles with non-spherical shape. The various branches of the DEM family are the distinct element method proposed by Cundall in 1971, the generalized discrete element method proposed by Hocking, Williams and Mustoe in 1985, the discontinuous deformation analysis (DDA) proposed by Shi in 1988 and the finite-discrete element method proposed by Munjiza and Owen in 2004.
Discrete element methods are processor intensive and this limits either the length of a simulation or the number of particles. Advances in the software are beginning to take advantage of parallel processing capabilities (shared or distributed systems) to scale up the number of particles or length of the simulation. An alternative to treating all particles separately is to average the physics across many particles and thereby treat the material as a continuum. In the case of solid-like granular behavior as in soil mechanics, the continuum approach usually treats the material as elastic or elasto-plastic and models it with the finite element method or a mesh free method. In the case of liquid-like or gas-like granular flow, the continuum approach may treat the material as a fluid and use computational fluid dynamics.
Discrete element method
From Wikipedia, the free encyclopedia
Jump to: navigation, search
The term discrete element method (DEM) is a family of numerical methods for computing the motion of a large number of particles like molecules or grains of sand. The method was originally applied by Cundall in 1971 to problems in rock mechanics. The theoretical basis of the method was detailed by Williams, Hocking, and Mustoe in 1985 who showed that DEM could be viewed as a generalized finite element method. Its applications to geomechanics problems is described in the book Numerical Modeling in Rock Mechanics, by Pande, G., Beer, G. and Williams, J.R.. Good sources detailing research in the area are to be found in the 1st, 2nd and 3rd International Conferences on Discrete Element Methods. Journal articles reviewing the state of the art have been published by Williams, and Bicanic (see below). A comprehensive treatment of the combined Finite Element-Discrete Element Method is contained in the book The Combined Finite-Discrete Element Method by Munjiza. The method is sometimes called molecular dynamics (MD), even when the particles are not molecules. However, in contrast to molecular dynamics the method can be used to model particles with non-spherical shape. The various branches of the DEM family are the distinct element method proposed by Cundall in 1971, the generalized discrete element method proposed by Hocking, Williams and Mustoe in 1985, the discontinuous deformation analysis (DDA) proposed by Shi in 1988 and the finite-discrete element method proposed by Munjiza and Owen in 2004.
Discrete element methods are processor intensive and this limits either the length of a simulation or the number of particles. Advances in the software are beginning to take advantage of parallel processing capabilities (shared or distributed systems) to scale up the number of particles or length of the simulation. An alternative to treating all particles separately is to average the physics across many particles and thereby treat the material as a continuum. In the case of solid-like granular behavior as in soil mechanics, the continuum approach usually treats the material as elastic or elasto-plastic and models it with the finite element method or a mesh free method. In the case of liquid-like or gas-like granular flow, the continuum approach may treat the material as a fluid and use computational fluid dynamics.
WBM
WBM: "Discrete Element Modelling
There are numerous engineering processes in the mining and minerals processing industries, such as the flow of coal through a chute or the comminution of material in a ball mill, that can not be solved using continuum based methods (i.e. the methods used in finite element modelling or computational fluid dynamics packages).
In contrast to continuum methods, the discrete element method (DEM) is a technique where the mechanics of thousands of interacting, individual elements are computed. Any geometry can be configured and the properties of the Particle-Particle and Particle-Boundary collisions can be adjusted to suit the materials. In a basic analysis, each particle or element would represented as a simple sphere, however these may be combined together to generate complex shapes observed in real world problems. Real world physics, such as friction, fracture, adhesion and cohesion, also can be incorporated into the simulation.
By explicitly modelling the dynamic motion and mechanical interactions of each body or particle in the physical problem, the simulation provides a detailed description of the velocities, positions, forces and collision events acting on each body or particle, at any given time during the simulation.
The information provided through DEM analysis can be used to investigate issues such as power requirements and wear rates for mechanical components, as well as material specific issues such as comminution rate, chute and hopper blockage and dust formation."
There are numerous engineering processes in the mining and minerals processing industries, such as the flow of coal through a chute or the comminution of material in a ball mill, that can not be solved using continuum based methods (i.e. the methods used in finite element modelling or computational fluid dynamics packages).
In contrast to continuum methods, the discrete element method (DEM) is a technique where the mechanics of thousands of interacting, individual elements are computed. Any geometry can be configured and the properties of the Particle-Particle and Particle-Boundary collisions can be adjusted to suit the materials. In a basic analysis, each particle or element would represented as a simple sphere, however these may be combined together to generate complex shapes observed in real world problems. Real world physics, such as friction, fracture, adhesion and cohesion, also can be incorporated into the simulation.
By explicitly modelling the dynamic motion and mechanical interactions of each body or particle in the physical problem, the simulation provides a detailed description of the velocities, positions, forces and collision events acting on each body or particle, at any given time during the simulation.
The information provided through DEM analysis can be used to investigate issues such as power requirements and wear rates for mechanical components, as well as material specific issues such as comminution rate, chute and hopper blockage and dust formation."
Thursday, August 17, 2006
Passage® Software
Passage® Software
Passage software is a collection of 3D and 1D finite element programs solving complex flow, heat transfer and other related problems in product design and manufacturing using advance CFD and other CAE software and techniques.
DEM - program is for predicting the flow particles under a wide variety of forces.
FLOW - program is a general purpose software for three-dimensional flow and heat transfer analysis.
Duct & Wheel - is for analysis of flows through passages and rotating blade passages
Sysflow - 1D flow software - is a system analysis software for flow networks
Compression - is a program for mold flow and heat transfer analyses of fiber reinforced molded parts
FreezeDrying - is a finite-element modeling software aimed at assisting the user and designer of freeze-drying processes in improving the quality of freeze-dried products in pharmaceutical and food processes.
PowerCAST - casting software for analysis of filling and solidification of materials
dieCAS - is for die casting analysis of filling, solidification, cavity distortion and die design
Custom software - for many specific applications within variety of industries
Passage software is a collection of 3D and 1D finite element programs solving complex flow, heat transfer and other related problems in product design and manufacturing using advance CFD and other CAE software and techniques.
DEM - program is for predicting the flow particles under a wide variety of forces.
FLOW - program is a general purpose software for three-dimensional flow and heat transfer analysis.
Duct & Wheel - is for analysis of flows through passages and rotating blade passages
Sysflow - 1D flow software - is a system analysis software for flow networks
Compression - is a program for mold flow and heat transfer analyses of fiber reinforced molded parts
FreezeDrying - is a finite-element modeling software aimed at assisting the user and designer of freeze-drying processes in improving the quality of freeze-dried products in pharmaceutical and food processes.
PowerCAST - casting software for analysis of filling and solidification of materials
dieCAS - is for die casting analysis of filling, solidification, cavity distortion and die design
Custom software - for many specific applications within variety of industries
Friday, April 28, 2006
Engineering Software - CAE & CFD Engineering Software - CAE System & Component Analysis
Engineering Software - CAE & CFD Engineering Software - CAE System & Component Analysis: "Advantage of Technalysis' System and Component Level Analysis Approach Entire system can be easily and quickly modeled and modified using Passage 1D .
The models can be created early in the design cycle to detect potential problems.
A sensitivity analysis can be performed to determine the critical parameters and improve system level performance.
Passage Flow can be used to do further analysis to improve specific component performance, understand and visualize complex flow behavior and solve any flow and heat transfer problems. "
The models can be created early in the design cycle to detect potential problems.
A sensitivity analysis can be performed to determine the critical parameters and improve system level performance.
Passage Flow can be used to do further analysis to improve specific component performance, understand and visualize complex flow behavior and solve any flow and heat transfer problems. "
Fluid Flow Software - Flow Modeling - Passage Sysflow for the prediction of� network performance.
Fluid Flow Software - Flow Modeling - Passage Sysflow for the prediction of network performance.: "Fluid Flow Software and Simulation Network Modeling - System Analysis PASSAGE/SYSFLOW Software is a one-dimensional System Fluid Flow and Heat Transfer Analysis program for the prediction of flow network performance.
PASSAGE/SYSFLOW Program provides very useful information in understanding the flow splits in branched flow passages and the overall heat fluxes between components. A 1D flow software is a very efficient and a relatively inexpensive tool for design and analysis.
PASSAGE/SYSFLOW Program is fast, user-friendly and effectively predicts performance in a variety of user-defined networks.
Steady state, compressible and incompressible flow network problems can be solved including heat transfer effects.
Virtually any flow network system and/or sub-system can be modeled using combinations of components included in the standard library.
A numerical model such as PASSAGE SYSFLOW serves as an invaluable tool to study the flow and heat-transfer in complex systems and to optimize the design process in a more cost effective and timely fashion.
Sysflow brochure "
CAE Software - Consulting - Electric Motors & Generators
CAE Software - Consulting - Electric Motors & Generators: "CAE Expertise in Electric Motors and GeneratorsTechnalysis has many years of experience in designing electric motors, generators & alternators Passage Wheel / Duct and Sysflow have been further developed to support these activities and their capabilities have been proven. Combined approach of system and component analysis together with experimental measurements is an essential and powerful tool for electric motor and generator design.
The use of computer analysis to model and predict the flow and heat performance of electric motors before committing to a prototype will greatly reduce the time and cost of product development. With this capability, better engineering decisions can be made and design uncertainties reduced.
Specific experience areas includes system and component analysis and design improvement of the following equipment and its components:
Electric motors
Generators
Alternators
Technalysis company overview brochure"
The use of computer analysis to model and predict the flow and heat performance of electric motors before committing to a prototype will greatly reduce the time and cost of product development. With this capability, better engineering decisions can be made and design uncertainties reduced.
Specific experience areas includes system and component analysis and design improvement of the following equipment and its components:
Electric motors
Generators
Alternators
Technalysis company overview brochure"
Flow Software -CFD - Flow Simulation
Flow Software -CFD - Flow Simulation: "PASSAGE Wheel and Duct Software
PASSAGE / Duct and Wheel Software is a 3D finite element software for analysis of flows through complex stationary and rotating passages.
Potential, Euler, and Navier-Stokes flow equations are solved for incompressible and compressible subsonic to transonic flow regimes, allowing the engineer the ability to include the effects of flow losses in the design process.
A user-friendly, interactive pre-processing module with a built-in 3-D CAD capability supports automatic mesh generation and display.
Calculated fluid properties such as velocity, pressure, entropy, Mach number and blade loading can be interpreted using the interactive post-processing module, which displays easily interpreted color x-y graphs, vector and contour plots.
"
Thursday, April 27, 2006
Passage Freeze Drying Software
Freeze Drying Software: "PASSAGE�Freeze Drying SoftwarePassage/FreezeDrying is a computer program designed for the simulation of freeze drying processes in vials and pans.
Passage/FreezeDrying provides modeling of containers with axisymmetric boundary conditions with both primary and secondary drying simulation capabilities. The software also handles containers with asymmetric boundary conditions, as in the case of vials placed in corners or near the walls of freeze-drying ovens. It is currently limited to primary drying simulations.
The user-friendly, interactive preprocessor accepts externally generated meshes and support automatic entry of material properties, process conditions, and display of geometry.
Passage/FreezeDrying also has user-friendly, interactive post-processing modules which display the computed temperature, vapor concentration, water pressure, and glass transition distributions in the form of contour plots and x-y graphs. Animation of sublimation front movements can also be obtained easily.
FreezeDrying brochure "
CAE Software - Freeze Drying Software
CAE Software - Freeze Drying Software: "Benefits of Freeze Drying SoftwareProvide a tool to predict drying times and process conditions to alleviate 'islands of ice' and glassing of product
Results can be used for FDA process approval
Minimize cost of testing and shorten drying time to increase yield
Provide detailed understanding of primary and secondary drying processes "
Navier-Stokes equations
Navier-Stokes equations : "Navier-Stokes equations
The Navier-Stokes equations, named after Claude-Louis Navier and George Gabriel Stokes, are a set of equations that describe the motion of fluid substances like liquids and gases. These equations establish that changes in momentum (acceleration) of the particles of a fluid are simply the product of changes in pressure and dissipative viscous forces (similar to friction) acting inside the fluid. These viscous forces originate in molecular interactions and dictate how sticky (viscous) a fluid is. Thus, the Navier-Stokes equations are a dynamical statement of the balance of forces acting at any given region of the fluid.
They are one of the most useful sets of equations because they describe the physics of a large number of phenomena of academic and economic interest. They are useful to model weather, ocean currents, water flow in a pipe, motion of stars inside a galaxy, flow around an airfoil (wing). They are also used in the design of aircraft and cars, the study of blood flow, the design of power stations, the analysis of the effects of pollution, etc.
The Navier-Stokes equations are differential equations which describe the motion of a fluid. These equations, unlike algebraic equations, do not seek to establish a relation among the variables of interest (e.g. velocity and pressure), rather they establish relations among the rates of change or fluxes of these quantities. In mathematical terms "
more... http://en.wikipedia.org/wiki/Navier-Stokes
The Navier-Stokes equations, named after Claude-Louis Navier and George Gabriel Stokes, are a set of equations that describe the motion of fluid substances like liquids and gases. These equations establish that changes in momentum (acceleration) of the particles of a fluid are simply the product of changes in pressure and dissipative viscous forces (similar to friction) acting inside the fluid. These viscous forces originate in molecular interactions and dictate how sticky (viscous) a fluid is. Thus, the Navier-Stokes equations are a dynamical statement of the balance of forces acting at any given region of the fluid.
They are one of the most useful sets of equations because they describe the physics of a large number of phenomena of academic and economic interest. They are useful to model weather, ocean currents, water flow in a pipe, motion of stars inside a galaxy, flow around an airfoil (wing). They are also used in the design of aircraft and cars, the study of blood flow, the design of power stations, the analysis of the effects of pollution, etc.
The Navier-Stokes equations are differential equations which describe the motion of a fluid. These equations, unlike algebraic equations, do not seek to establish a relation among the variables of interest (e.g. velocity and pressure), rather they establish relations among the rates of change or fluxes of these quantities. In mathematical terms "
more... http://en.wikipedia.org/wiki/Navier-Stokes
Friday, April 21, 2006
Fluid dynamics
Fluid dynamics - Wikipedia, the free encyclopedia: "Fluid dynamics
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Fluid dynamics is the subdiscipline of fluid mechanics that studies fluids (liquids and gases) in motion. The discipline has a number of subdisciplines, including aerodynamics (the study of gases) and hydrodynamics (the study of liquids). Fluid dynamics has a wide range of applications, including calculating forces and moments on aircraft, determining the mass flow rate of petroleum through pipelines, predicting weather patterns. Some of its principles are even used in traffic engineering, where traffic is treated as a continuous fluid.
Fluid dynamics offers a mathematical structure, which underlies these practical disciplines, that embraces empirical and semi-empirical laws, derived from flow measurement, used to solve practical problems. The solution of a fluid dynamics problem typically involves calculating for various properties of the fluid, such as velocity, pressure, density, and temperature, as functions of space and time." more... http://en.wikipedia.org/wiki/Fluid_dynamics
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Fluid dynamics is the subdiscipline of fluid mechanics that studies fluids (liquids and gases) in motion. The discipline has a number of subdisciplines, including aerodynamics (the study of gases) and hydrodynamics (the study of liquids). Fluid dynamics has a wide range of applications, including calculating forces and moments on aircraft, determining the mass flow rate of petroleum through pipelines, predicting weather patterns. Some of its principles are even used in traffic engineering, where traffic is treated as a continuous fluid.
Fluid dynamics offers a mathematical structure, which underlies these practical disciplines, that embraces empirical and semi-empirical laws, derived from flow measurement, used to solve practical problems. The solution of a fluid dynamics problem typically involves calculating for various properties of the fluid, such as velocity, pressure, density, and temperature, as functions of space and time." more... http://en.wikipedia.org/wiki/Fluid_dynamics
Computational fluid dynamics
Computational fluid dynamics - Wikipedia, the free encyclopedia: "Computational fluid dynamics
From Wikipedia, the free encyclopedia
(Redirected from Computational Fluid Dynamics)
Jump to: navigation, search
Computational fluid dynamics (CFD) is the use of computers to analyze problems in fluid dynamics.
The most fundamental consideration in CFD is how one treats a continuous fluid in a discretized fashion on a computer. One method is to discretize the spatial domain into small cells to form a volume mesh or grid, and then apply a suitable algorithm to solve the equations of motion (Euler equations for inviscid, and Navier-Stokes equations for viscid flow). In addition, such a mesh can be either irregular (for instance consisting of triangles in 2D, or pyramidal solids in 3D) or regular; the distinguishing characteristic of the former is that each cell must be stored separately in memory. Lastly, if the problem is highly dynamic and occupies a wide range of scales, the grid itself can be dynamically modified in time, as in adaptive mesh refinement methods more... http://en.wikipedia.org/wiki/Computational_Fluid_Dynamics
If one chooses not to proceed with a mesh-based method, a number of alternatives exist, notably :
smoothed particle hydrodynamics, a Lagrangian method of solving fluid problems,
Spectral methods, a technique where the equations are projected onto basis functions like the spherical harmonics and Chebyshev polynomials
Lattice Boltzmann methods, which simulate an equivalent mesoscopic system on a Cartesian grid, instead of solving the macroscopic system (or the real microscopic physics).
It is possible to directly solve the Navier-Stokes equations for laminar flow cases and for turbulent flows when all of the relevant length scales can be contained on the grid (a Direct numerical simulation). In general however, the range of length scale"
From Wikipedia, the free encyclopedia
(Redirected from Computational Fluid Dynamics)
Jump to: navigation, search
Computational fluid dynamics (CFD) is the use of computers to analyze problems in fluid dynamics.
The most fundamental consideration in CFD is how one treats a continuous fluid in a discretized fashion on a computer. One method is to discretize the spatial domain into small cells to form a volume mesh or grid, and then apply a suitable algorithm to solve the equations of motion (Euler equations for inviscid, and Navier-Stokes equations for viscid flow). In addition, such a mesh can be either irregular (for instance consisting of triangles in 2D, or pyramidal solids in 3D) or regular; the distinguishing characteristic of the former is that each cell must be stored separately in memory. Lastly, if the problem is highly dynamic and occupies a wide range of scales, the grid itself can be dynamically modified in time, as in adaptive mesh refinement methods more... http://en.wikipedia.org/wiki/Computational_Fluid_Dynamics
If one chooses not to proceed with a mesh-based method, a number of alternatives exist, notably :
smoothed particle hydrodynamics, a Lagrangian method of solving fluid problems,
Spectral methods, a technique where the equations are projected onto basis functions like the spherical harmonics and Chebyshev polynomials
Lattice Boltzmann methods, which simulate an equivalent mesoscopic system on a Cartesian grid, instead of solving the macroscopic system (or the real microscopic physics).
It is possible to directly solve the Navier-Stokes equations for laminar flow cases and for turbulent flows when all of the relevant length scales can be contained on the grid (a Direct numerical simulation). In general however, the range of length scale"
Compression molding -
Compression molding : "Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. The mold is closed with a top force or plug member, pressure is applied to force the material into contact with all mold areas, and heat and pressure are maintained until the molding material has cured. The process employs thermosetting resins in a partially cured stage, either in the form of granules, putty-like masses, or preforms. Compression molding is a high-volume, high-pressure method suitable for molding complex, high-strength fiberglass reinforcements. Advanced composite thermoplastics can also be compression molded with unidirectional tapes, woven fabrics, randomly orientated fiber mat or chopped strand. The advantage of compression molding is its ability to mold large, fairly intricate parts. Compression molding produces fewer knit lines and less fiber-length degradation than injection molding.
Retrieved from 'http://en.wikipedia.org/wiki/Compression_molding'"
Retrieved from 'http://en.wikipedia.org/wiki/Compression_molding'"
Technalysis Inc. - CAE & CFD Software - Consulting
Technalysis Inc. - CAE & CFD Software - Consulting: "CAE Expertise in Appliance, Equipment and Tools IndustryTechnalysis has been providing advanced CAE technology to the appliance industry and its suppliers.
Technalysis can fully support or compliment client engineering capabilities on problems related to flow, heat transfer, noise, vibration, stress, electromagnetic and materials processing in product design and manufacturing.
Specific experience areas includes system and component analysis and design improvement of the following equipment and its components:
Refrigerators
Dishwashers
Ovens and ranges
Vacuum cleaners
Printers
Copiers
Hand tools"
Technalysis can fully support or compliment client engineering capabilities on problems related to flow, heat transfer, noise, vibration, stress, electromagnetic and materials processing in product design and manufacturing.
Specific experience areas includes system and component analysis and design improvement of the following equipment and its components:
Refrigerators
Dishwashers
Ovens and ranges
Vacuum cleaners
Printers
Copiers
Hand tools"
CAE Software - Consulting - Electric Motors & Generators
CAE Software - Consulting - Electric Motors & Generators: "CAE Expertise in Electric Motors and GeneratorsTechnalysis has many years of experience in designing electric motors, generators & alternators Passage� Wheel / Duct and Sysflow have been further developed to support these activities and their capabilities have been proven. Combined approach of system and component analysis together with experimental measurements is an essential and powerful tool for electric motor and generator design.
The use of computer analysis to model and predict the flow and heat performance of electric motors before committing to a prototype will greatly reduce the time and cost of product development. With this capability, better engineering decisions can be made and design uncertainties reduced.
Specific experience areas includes system and component analysis and design improvement of the following equipment and its components:
Electric motors
Generators
Alternators
The use of computer analysis to model and predict the flow and heat performance of electric motors before committing to a prototype will greatly reduce the time and cost of product development. With this capability, better engineering decisions can be made and design uncertainties reduced.
Specific experience areas includes system and component analysis and design improvement of the following equipment and its components:
Electric motors
Generators
Alternators
CAE - CFD Consulting and Enginerring in Automotive and Heavy Machinery Industry
CAE - CFD Consulting and Enginerring in Automotive and Heavy Machinery Industry: "CAE Expertise and CFD Consulting in Automotive and Heavy Machinery IndustrySince 1985, Technalysis has been providing advanced CAE technology and CFD consulting to the automotive, construction, agricultural equipment companies and its suppliers.
Technalysis can fully support or compliment client engineering capabilities on problems related to flow, heat transfer, noise, vibration, stress, electromagnetic and materials processing in product design and manufacturing.
Specific experience areas includes analysis and design improvement of the following components, systems and processes:
Engine components
Cooling systems
Brakes and clutches
Turbines and compressors
Torque converters
Water pumps
Pumps and valves
Climate control
Electric motor cooling
Fan design
Underhood cooling
Exhaust systems
Emission control
Casting
Compression and injection molding
Extrusion "
Technalysis can fully support or compliment client engineering capabilities on problems related to flow, heat transfer, noise, vibration, stress, electromagnetic and materials processing in product design and manufacturing.
Specific experience areas includes analysis and design improvement of the following components, systems and processes:
Engine components
Cooling systems
Brakes and clutches
Turbines and compressors
Torque converters
Water pumps
Pumps and valves
Climate control
Electric motor cooling
Fan design
Underhood cooling
Exhaust systems
Emission control
Casting
Compression and injection molding
Extrusion "
Tuesday, April 18, 2006
Compression molding
Compression molding: "Compression molding
From Wikipedia, the free encyclopedia
Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. The mold is closed with a top force or plug member, pressure is applied to force the material into contact with all mold areas, and heat and pressure are maintained until the molding material has cured. The process employs thermosetting resins in a partially cured stage, either in the form of granules, putty-like masses, or preforms. Compression molding is a high-volume, high-pressure method suitable for molding complex, high-strength fiberglass reinforcements. Advanced composite thermoplastics can also be compression molded with unidirectional tapes, woven fabrics, randomly orientated fiber mat or chopped strand. The advantage of compression molding is its ability to mold large, fairly intricate parts. Compression molding produces fewer knit lines and less fiber-length degradation than injection molding.
Retrieved from 'http://en.wikipedia.org/wiki/Compression_molding'"
From Wikipedia, the free encyclopedia
Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. The mold is closed with a top force or plug member, pressure is applied to force the material into contact with all mold areas, and heat and pressure are maintained until the molding material has cured. The process employs thermosetting resins in a partially cured stage, either in the form of granules, putty-like masses, or preforms. Compression molding is a high-volume, high-pressure method suitable for molding complex, high-strength fiberglass reinforcements. Advanced composite thermoplastics can also be compression molded with unidirectional tapes, woven fabrics, randomly orientated fiber mat or chopped strand. The advantage of compression molding is its ability to mold large, fairly intricate parts. Compression molding produces fewer knit lines and less fiber-length degradation than injection molding.
Retrieved from 'http://en.wikipedia.org/wiki/Compression_molding'"
Compression Molding Software
PASSAGE®/Compression Software
· PASSAGE®/COMPRESSION Software is a finite element program for the mold filling simulation of complex three-dimensional, thin-walled parts.
· Flow models include: Barone-Caulk hydrodynamic friction and generalized Newtonian fluid to simulate the non-isothermal filling of SMC, BMC, and glass; fiber orientation for SMC and curing kinetics for thermosets.
· A high-pressure in-mold coating simulation option is also available.
· A user-friendly preprocessor allows mesh generation and capability to accept externally generated
meshes with interactive entry of process conditions and numerical control parameters.
· Results are viewed with an interactive post-processor that features dynamic rotation and zooming animation of results, and viewing options for color contour and vector plots.
· PASSAGE®/COMPRESSION Software is a finite element program for the mold filling simulation of complex three-dimensional, thin-walled parts.
· Flow models include: Barone-Caulk hydrodynamic friction and generalized Newtonian fluid to simulate the non-isothermal filling of SMC, BMC, and glass; fiber orientation for SMC and curing kinetics for thermosets.
· A high-pressure in-mold coating simulation option is also available.
· A user-friendly preprocessor allows mesh generation and capability to accept externally generated
meshes with interactive entry of process conditions and numerical control parameters.
· Results are viewed with an interactive post-processor that features dynamic rotation and zooming animation of results, and viewing options for color contour and vector plots.
Wednesday, April 12, 2006
Discrete Element Modeling - Passage DEM Software- Particle Flow Simulation
Discrete Element Modeling - Passage DEM Software- Particle Flow Simulation: "Discrete Element Method
PASSAGE/DEM is for predicting the flow particles under a wide variety of forces. Some features of Passage Discrete Element Method Software:
Equations of motion are solved for translation and rotation of individual particles traveling in electrostatic, magnetic, or gravitational fields.
The size of the particles can be in the order of microns or larger. All appropriate forces are included in the formulation.
The particles can be of different shape and size with a given distributions.
The particles can carry charge. Individual charging of particles are calculated.
Different properties of the particles such as charge, temperature, etc. can be predicted by tracking the motion of each particle.
Different types of boundary surfaces can be modeled whether they are stationary or moving.
A user-friendly pre- and post-processor is provided to input the geometry of the boundaries and the particles, as well as the display of motion and other properties of the particles.
Structural deformations of rollers, belts driving the particles are also included in the models.
Runs on PC-based Workstations.
Technalysis offers customization of PASSAGE�/DEM to meet specific customer needs.
DEM Software Licensing information"
PASSAGE/DEM is for predicting the flow particles under a wide variety of forces. Some features of Passage Discrete Element Method Software:
Equations of motion are solved for translation and rotation of individual particles traveling in electrostatic, magnetic, or gravitational fields.
The size of the particles can be in the order of microns or larger. All appropriate forces are included in the formulation.
The particles can be of different shape and size with a given distributions.
The particles can carry charge. Individual charging of particles are calculated.
Different properties of the particles such as charge, temperature, etc. can be predicted by tracking the motion of each particle.
Different types of boundary surfaces can be modeled whether they are stationary or moving.
A user-friendly pre- and post-processor is provided to input the geometry of the boundaries and the particles, as well as the display of motion and other properties of the particles.
Structural deformations of rollers, belts driving the particles are also included in the models.
Runs on PC-based Workstations.
Technalysis offers customization of PASSAGE�/DEM to meet specific customer needs.
DEM Software Licensing information"
Passage Freeze Drying Software
CAE Software - Freeze Drying Software: "PASSAGE FrezeDrying SoftwarePASSAGE/FreezeDrying is a finite-element modeling software aimed at assisting the user and designer of freeze-drying processes in improving the quality of freeze-dried products in pharmaceutical and food processes. Drying processes of various geometric models may be modeled including the effects of shelve temperature, chamber pressure, convection, and radiation in freeze-drying ovens.
A user-friendly, interactive pre-processing accepts externally generated meshes and supports automatic entry of material properties and process conditions, and display of geometry.
A user-friendly, interactive post-processing module displays the computed temperature, vapor pressure, water concentration and glass transition temperature distributions in the form of contour plots and x-y graphs.
FreezeDrying brochure "
A user-friendly, interactive pre-processing accepts externally generated meshes and supports automatic entry of material properties and process conditions, and display of geometry.
A user-friendly, interactive post-processing module displays the computed temperature, vapor pressure, water concentration and glass transition temperature distributions in the form of contour plots and x-y graphs.
FreezeDrying brochure "
Friday, April 07, 2006
Discrete element method - Wikipedia, the free encyclopedia
Discrete element method - Wikipedia, the free encyclopedia: "Applications
The fundamental assumption of the method is that the material consists of separate, discrete particles. These particles may have different shapes and properties. Some examples are:
liquids and solutions, for instance of sugar or proteins;
bulk materials in storage silos, like cereal;
granular matter, like sand;
powders, like toner.
Typical industries using DEM are:
Mining
Pharmaceutical
Oil and gas
Agriculture and food handling
Chemical "
The fundamental assumption of the method is that the material consists of separate, discrete particles. These particles may have different shapes and properties. Some examples are:
liquids and solutions, for instance of sugar or proteins;
bulk materials in storage silos, like cereal;
granular matter, like sand;
powders, like toner.
Typical industries using DEM are:
Mining
Pharmaceutical
Oil and gas
Agriculture and food handling
Chemical "
Numerical analysis - Wikipedia, the free encyclopedia
Numerical analysis - Wikipedia, the free encyclopedia: "Numerical analysis
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Numerical analysis is the study of algorithms for the problems of continuous mathematics (as distinguished from discrete mathematics). Some of the problems it deals with arise directly from the study of calculus; other areas of interest are real variable or complex variable questions, numerical linear algebra over the real or complex fields, the solution of differential equations, and other related problems arising in the physical sciences and engineering."
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Numerical analysis is the study of algorithms for the problems of continuous mathematics (as distinguished from discrete mathematics). Some of the problems it deals with arise directly from the study of calculus; other areas of interest are real variable or complex variable questions, numerical linear algebra over the real or complex fields, the solution of differential equations, and other related problems arising in the physical sciences and engineering."
Discrete element method - Wikipedia, the free encyclopedia
Discrete element method - Wikipedia, the free encyclopedia: "Outline of the method
A DEM-simulation is started by putting all particles in a certain position and giving them an initial velocity. Then the forces which act on each particle are computed from the initial data and the relevant physical laws.
The following forces may have to be considered in macroscopic simulations:
friction, when two particles touch each other;
recoil, when two particles collide;
gravity (the force of attraction between particles due to their mass), which is only relevant in astronomical simulations.
On a molecular level, we may consider
the Coulomb force, the electrostatic attraction or repulsion of particles carrying electric charge;
Pauli repulsion, when two atoms approach each other closely;
van der Waals force.
All these forces are added up to find the total force acting on each particle. An integration method is employed to compute the change in the position and the velocity of each particle during a certain time step from Newton's laws of motion. Then, the new positions are used to compute the forces during the next step, and this loop is repeated until the simulation ends.
Typical integration methods used in a discrete element method are:
the Verlet algorithm,
velocity Verlet,
the leapfrog method"
A DEM-simulation is started by putting all particles in a certain position and giving them an initial velocity. Then the forces which act on each particle are computed from the initial data and the relevant physical laws.
The following forces may have to be considered in macroscopic simulations:
friction, when two particles touch each other;
recoil, when two particles collide;
gravity (the force of attraction between particles due to their mass), which is only relevant in astronomical simulations.
On a molecular level, we may consider
the Coulomb force, the electrostatic attraction or repulsion of particles carrying electric charge;
Pauli repulsion, when two atoms approach each other closely;
van der Waals force.
All these forces are added up to find the total force acting on each particle. An integration method is employed to compute the change in the position and the velocity of each particle during a certain time step from Newton's laws of motion. Then, the new positions are used to compute the forces during the next step, and this loop is repeated until the simulation ends.
Typical integration methods used in a discrete element method are:
the Verlet algorithm,
velocity Verlet,
the leapfrog method"
CAE Software - Freeze Drying Software
CAE Software - Freeze Drying Software:
PASSAGE FrezeDrying Software is a finite-element modeling software aimed at assisting the user and designer of freeze-drying processes in improving the quality of freeze-dried products in pharmaceutical and food processes. Both axisymmetric models of vials and planar two-dimensional cross-sectional models of pan drying processes may be modeled including the effects of shelve temperature, chamber pressure, convection, and radiation in freeze-drying ovens.
A user-friendly, interactive preprocessing module with a built-in 3-D CAD capability supports automatic entry of material properties and process conditions, mesh generation, and display of geometry.
A user-friendly, interactive postprocessing module displays the computed temperature, vapor pressure, and water concentration distributions in the form of contour"
PASSAGE FrezeDrying Software is a finite-element modeling software aimed at assisting the user and designer of freeze-drying processes in improving the quality of freeze-dried products in pharmaceutical and food processes. Both axisymmetric models of vials and planar two-dimensional cross-sectional models of pan drying processes may be modeled including the effects of shelve temperature, chamber pressure, convection, and radiation in freeze-drying ovens.
A user-friendly, interactive preprocessing module with a built-in 3-D CAD capability supports automatic entry of material properties and process conditions, mesh generation, and display of geometry.
A user-friendly, interactive postprocessing module displays the computed temperature, vapor pressure, and water concentration distributions in the form of contour"
Engineering Software
Advantage of Technalysis' System and Component Level Analysis Approach
Entire system can be easily and quickly modeled and modified using Passage 1D Sysflow Software.
The models can be created early in the design cycle to detect potential problems.
A sensitivity analysis can be performed to determine the critical parameters and improve system level performance.
Passage Flow can be used to do further 3D analysis to improve specific component performance, understand and visualize complex flow behavior and solve any flow and heat transfer problems.
Entire system can be easily and quickly modeled and modified using Passage 1D Sysflow Software.
The models can be created early in the design cycle to detect potential problems.
A sensitivity analysis can be performed to determine the critical parameters and improve system level performance.
Passage Flow can be used to do further 3D analysis to improve specific component performance, understand and visualize complex flow behavior and solve any flow and heat transfer problems.
Thursday, April 06, 2006
Passage Compression Software
Benefits of Passage/ Compression Software
Modeling thin walled geometries
Hele, Shaw or Barone , Caulk model for flow
Filling and heat transfer coupled
Post-fill curing
Fiber orientations
Modeling thin walled geometries
Hele, Shaw or Barone , Caulk model for flow
Filling and heat transfer coupled
Post-fill curing
Fiber orientations
CAE Software - Compression Software
PASSAGE/COMPRESSION Software is a finite element program for the mold filling simulation of complex three-dimensional, thin-walled parts.
Flow models include: Barone-Caulk hydrodynamic friction and generalized Newtonian fluid to simulate the non-isothermal filling of SMC, BMC, and glass; fiber orientation for SMC and curing kinetics for thermosets.
A high-pressure in-mold coating simulation option is also available.
A user-friendly preprocessor allows mesh generation and capability to accept externally generated
meshes with interactive entry of process conditions and numerical control parameters.
Results are viewed with an interactive post-processor that features dynamic rotation and zooming animation of results, and viewing options for color contour and vector plots."
Flow models include: Barone-Caulk hydrodynamic friction and generalized Newtonian fluid to simulate the non-isothermal filling of SMC, BMC, and glass; fiber orientation for SMC and curing kinetics for thermosets.
A high-pressure in-mold coating simulation option is also available.
A user-friendly preprocessor allows mesh generation and capability to accept externally generated
meshes with interactive entry of process conditions and numerical control parameters.
Results are viewed with an interactive post-processor that features dynamic rotation and zooming animation of results, and viewing options for color contour and vector plots."
Tuesday, April 04, 2006
Passage / Flow Software
CFD Flow Modeling Software - CAE - Flow Simulation:
PASSAGE/FLOW Software is a general purpose software for three-dimensional flow and heat transfer analysis.
PASSAGE/FLOW program can minimize the cost and time of traditional prototype building and testing, thus shortening product design cycles
Designs can be analyzed and modified many times to evaluate flow losses on the computer before expensive and time consuming design decisions are finalized.
Technalysis offers customization services whereby PASSAGE /Flow can be integrated with other programs to fit unique customer specifications.
Licensing information
PASSAGE/FLOW Software is a general purpose software for three-dimensional flow and heat transfer analysis.
PASSAGE/FLOW program can minimize the cost and time of traditional prototype building and testing, thus shortening product design cycles
Designs can be analyzed and modified many times to evaluate flow losses on the computer before expensive and time consuming design decisions are finalized.
Technalysis offers customization services whereby PASSAGE /Flow can be integrated with other programs to fit unique customer specifications.
Licensing information
CFD Flow Modeling Software
CFD Flow Modeling Software - CAE - Flow Simulation:
Benefits of 3D Flow Software3D analysis for CFD flow modeling and heat transfer
Understand and visualize complex flow behavior
Improve component performance
Reduced solution time
Powerful component design tool when combined with 1D system analysis program
Benefits of 3D Flow Software3D analysis for CFD flow modeling and heat transfer
Understand and visualize complex flow behavior
Improve component performance
Reduced solution time
Powerful component design tool when combined with 1D system analysis program
Tuesday, March 28, 2006
CAE Software and Consulting for Appliance Industry
Technalysis Inc. - CAE & CFD Software - Consulting:
"CAE Expertise in Appliance, Equipment and Tools Industry
"CAE Expertise in Appliance, Equipment and Tools Industry
Technalysis has been providing advanced CAE technology to the appliance industry and its suppliers.
Technalysis can fully support or compliment client engineering capabilities on problems related to flow, heat transfer, noise, vibration, stress, electromagnetic and materials processing in product design and manufacturing.
Specific experience areas includes system and component analysis and design improvement of the following equipment and its components:
Refrigerators
Dishwashers
Ovens and ranges
Vacuum cleaners
Printers
Copiers
Hand tools "
Friday, March 24, 2006
Fluid Flow Software - Flow Modeling - Passage Sysflow for the prediction of network performance.
Fluid Flow Software - Flow Modeling - Passage Sysflow for the prediction of network performance.: "Fluid Flow Software and Simulation Network Modeling - System Analysis PASSAGE/SYSFLOW Software is a one-dimensional System Fluid Flow and Heat Transfer Analysis program for the prediction of flow network performance.
PASSAGE/SYSFLOW Program provides very useful information in understanding the flow splits in branched flow passages and the overall heat fluxes between components. A 1D flow software is a very efficient and a relatively inexpensive tool for design and analysis.
PASSAGE/SYSFLOW Program is fast, user-friendly and effectively predicts performance in a variety of user-defined networks.
Steady state, compressible and incompressible flow network problems can be solved including heat transfer effects.
Virtually any flow network system and/or sub-system can be modeled using combinations of components included in the standard library.
A numerical model such as PASSAGE SYSFLOW serves as an invaluable tool to study the flow and heat-transfer in complex systems and to optimize the design process in a more cost effective and timely fashion."
PASSAGE/SYSFLOW Program provides very useful information in understanding the flow splits in branched flow passages and the overall heat fluxes between components. A 1D flow software is a very efficient and a relatively inexpensive tool for design and analysis.
PASSAGE/SYSFLOW Program is fast, user-friendly and effectively predicts performance in a variety of user-defined networks.
Steady state, compressible and incompressible flow network problems can be solved including heat transfer effects.
Virtually any flow network system and/or sub-system can be modeled using combinations of components included in the standard library.
A numerical model such as PASSAGE SYSFLOW serves as an invaluable tool to study the flow and heat-transfer in complex systems and to optimize the design process in a more cost effective and timely fashion."
Consulting Engineering Software - CFD - CAE Thermal� Flow Analysis
Consulting Engineering - Software - CFD - CAE Thermal & Flow Analysis: "Consulting Services - Passage Software - Advance CAE & CFD Engineering - Fluid Flow and Thermal Analysis - System Optimizations and Component DesignSince 1985, Technalysis has been providing advanced CAE technology involving fluids, materials and manufacturing processes within wide range of industrial applications with its Technalysis Consulting and Passage Software.
Technalysis specializes solving complex fluid flow and heat transfer problems using computational fluid dynamics (CFD) and other advance CAE solutions.
Technalysis' CAE - CFD flow modeling capabilities can fully support or complement and enhance clients engineering capabilities in product design and manufacturing.
Technalysis company overview brochure "
Technalysis specializes solving complex fluid flow and heat transfer problems using computational fluid dynamics (CFD) and other advance CAE solutions.
Technalysis' CAE - CFD flow modeling capabilities can fully support or complement and enhance clients engineering capabilities in product design and manufacturing.
Technalysis company overview brochure "
Wednesday, March 22, 2006
Mechanical engineering - Wikipedia, the free encyclopedia
Mechanical engineering - Wikipedia, the free encyclopedia: "Mechanical engineering
From Wikipedia, the free encyclopedia
Mechanical engineering is a very broad field of engineering that involves the application of physical principles for analysis, design, manufacturing, and maintenance of mechanical systems. The system can be as simple as the design of a chair for comfort or as complex as the operations of a turbo-charge engine for speed. It can be as small as the manufacturing of a nano-sized gear or as large as the structure of a supertanker used to carry oil around the world.
The major divisions of mechanical engineering are designs and controls, thermo-science and fluids, engineering mechanics, and manufacturing. Depending on the colleges and the universities, some mechanical engineering programs offer more specialized programs, such as mechatronics, robotics, transport and logistics, cryogenics, and biomechanics, if a separate department does not exist for these subjects.
Modern analysis and design processes in mechanical engineering are aided by various computational tools like finite element analysis (FEA) and computational fluid dynamics (CFD), computer-aided design (CAD) and computer-aided manufacturing (CAM). In system design and controls, a mechanical engineer may apply CAD/CAM systems to feed �instructions' to computer numerically-controlled (CNC) machines such as robots, milling machines, and lathes. In this way the engineer could automate the manufacturing process without the need for intermediate drawings. A mechanical engineer working in thermo-fluid might design a heat sink, an air conditioning system, or an internal combustion engine. Other processes might focus on the fluid itself, such as a fan to cool an electrical system"
From Wikipedia, the free encyclopedia
Mechanical engineering is a very broad field of engineering that involves the application of physical principles for analysis, design, manufacturing, and maintenance of mechanical systems. The system can be as simple as the design of a chair for comfort or as complex as the operations of a turbo-charge engine for speed. It can be as small as the manufacturing of a nano-sized gear or as large as the structure of a supertanker used to carry oil around the world.
The major divisions of mechanical engineering are designs and controls, thermo-science and fluids, engineering mechanics, and manufacturing. Depending on the colleges and the universities, some mechanical engineering programs offer more specialized programs, such as mechatronics, robotics, transport and logistics, cryogenics, and biomechanics, if a separate department does not exist for these subjects.
Modern analysis and design processes in mechanical engineering are aided by various computational tools like finite element analysis (FEA) and computational fluid dynamics (CFD), computer-aided design (CAD) and computer-aided manufacturing (CAM). In system design and controls, a mechanical engineer may apply CAD/CAM systems to feed �instructions' to computer numerically-controlled (CNC) machines such as robots, milling machines, and lathes. In this way the engineer could automate the manufacturing process without the need for intermediate drawings. A mechanical engineer working in thermo-fluid might design a heat sink, an air conditioning system, or an internal combustion engine. Other processes might focus on the fluid itself, such as a fan to cool an electrical system"
Computer-aided manufacturing - Wikipedia, the free encyclopedia
Computer-aided manufacturing - Wikipedia, the free encyclopedia: "Computer-aided manufacturing
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Integrating computer-aided manufacturing (CAM) with computer-aided design (CAD) systems produces faster and more efficient manufacturing processes. This methodology is applied in many different manufacturing areas, such as the automotive, aviation, and furniture industries.
C.A.M. is a software process that can directly convert an object (product drawing) into code so that a machine, such as a lathe or milling machine, can manufacture the product. The entire system tends to be expensive; a computer system with software may cost in excess of �10 000 GBP ($18,000 USD).
A CAM system simplifies the machining and design process in CNC manufacturing. In most cases the CAM system will work with a CAD design made in a 3D environment. The CNC programmer will then specify the machining operations and the CAM system will create the CNC program. This compatibility of CAD/CAM systems eliminates the need for redefining the work piece configuration to the CAM system."
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Integrating computer-aided manufacturing (CAM) with computer-aided design (CAD) systems produces faster and more efficient manufacturing processes. This methodology is applied in many different manufacturing areas, such as the automotive, aviation, and furniture industries.
C.A.M. is a software process that can directly convert an object (product drawing) into code so that a machine, such as a lathe or milling machine, can manufacture the product. The entire system tends to be expensive; a computer system with software may cost in excess of �10 000 GBP ($18,000 USD).
A CAM system simplifies the machining and design process in CNC manufacturing. In most cases the CAM system will work with a CAD design made in a 3D environment. The CNC programmer will then specify the machining operations and the CAM system will create the CNC program. This compatibility of CAD/CAM systems eliminates the need for redefining the work piece configuration to the CAM system."
Computer-aided engineering - Wikipedia, the free encyclopedia
Computer-aided engineering - Wikipedia, the free encyclopedia: "Computer-aided engineering
From Wikipedia, the free encyclopedia
Computer-aided Engineering analysis (often referred to as CAE) is the application of computer software in engineering to analyze the robustness and performance of components and assemblies. It encompasses simulation, validation and optimization of products and manufacturing tools.
The term CAE has also been used by some in the past to describe the use of computer technology within engineering in a broader sense than just engineering analysis. It was in this context that the term was coined by Dr. Jason Lemon, founder of SDRC in the late 70's. This definition is however better known today by the terms CAx and PLM.
CAE areas covered include:
Stress analysis on components and assemblies using FEA (Finite Element Analysis);
Thermal and fluid flow analysis Computational fluid dynamics (CFD);
Kinematics;
Mechanical event simulation (MES).
Analysis tools for process simulation for operations such as casting, molding, and die press forming.
In general, there are three phases in any computer-aided engineering task:
Pre-processing � defining the model and environmental factors to be applied to it. (typically a finite element mesh model, but facet, voxel and thin sheet methods are also used)
Analysis solver (usually performed on high powered computers)
Post-processing of results (using visualization tools) "
From Wikipedia, the free encyclopedia
Computer-aided Engineering analysis (often referred to as CAE) is the application of computer software in engineering to analyze the robustness and performance of components and assemblies. It encompasses simulation, validation and optimization of products and manufacturing tools.
The term CAE has also been used by some in the past to describe the use of computer technology within engineering in a broader sense than just engineering analysis. It was in this context that the term was coined by Dr. Jason Lemon, founder of SDRC in the late 70's. This definition is however better known today by the terms CAx and PLM.
CAE areas covered include:
Stress analysis on components and assemblies using FEA (Finite Element Analysis);
Thermal and fluid flow analysis Computational fluid dynamics (CFD);
Kinematics;
Mechanical event simulation (MES).
Analysis tools for process simulation for operations such as casting, molding, and die press forming.
In general, there are three phases in any computer-aided engineering task:
Pre-processing � defining the model and environmental factors to be applied to it. (typically a finite element mesh model, but facet, voxel and thin sheet methods are also used)
Analysis solver (usually performed on high powered computers)
Post-processing of results (using visualization tools) "
Technalysis
Technalysis: "CAE Expertise Modeling of Pharmaceutical and Chemical ProcessesTechnalysis has been providing advanced CAE technology to the pharmaceutical and chemical companies and its suppliers.
Benefits of Process modelingProvide an understanding of complex fluid flow and heat transfer processes.
Enable chemists or engineers to observe in detail the workings inside equipment that would be difficult to measure.
Provide flexibility by observing the effect of changing a design and / or process parameter
Provide predictive tool for scale-up problems
Achieve significant cost savings by minimizing the number of tests to be performed t achieve desired results
Improve process control trough better understanding of the system "
Benefits of Process modelingProvide an understanding of complex fluid flow and heat transfer processes.
Enable chemists or engineers to observe in detail the workings inside equipment that would be difficult to measure.
Provide flexibility by observing the effect of changing a design and / or process parameter
Provide predictive tool for scale-up problems
Achieve significant cost savings by minimizing the number of tests to be performed t achieve desired results
Improve process control trough better understanding of the system "
CAE Software - Consulting - Electric Motors & Generators
CAE Software - Consulting - Electric Motors & Generators: "CAE Expertise in Electric Motors and GeneratorsTechnalysis has many years of experience in designing electric motors, generators & alternators Passage� Wheel / Duct and Sysflow have been further developed to support these activities and their capabilities have been proven. Combined approach of system and component analysis together with experimental measurements is an essential and powerful tool for electric motor and generator design.
The use of computer analysis to model and predict the flow and heat performance of electric motors before committing to a prototype will greatly reduce the time and cost of product development. With this capability, better engineering decisions can be made and design uncertainties reduced.
Specific experience areas includes system and component analysis and design improvement of the following equipment and its components:
Electric motors
Generators
Alternators
The use of computer analysis to model and predict the flow and heat performance of electric motors before committing to a prototype will greatly reduce the time and cost of product development. With this capability, better engineering decisions can be made and design uncertainties reduced.
Specific experience areas includes system and component analysis and design improvement of the following equipment and its components:
Electric motors
Generators
Alternators
CAE - CFD Consulting and Enginerring in Automotive and Heavy Machinery Industry
CAE - CFD Consulting and Enginerring in Automotive and Heavy Machinery Industry: "CAE Expertise and CFD Consulting in Automotive and Heavy Machinery IndustrySince 1985, Technalysis has been providing advanced CAE technology and CFD consulting to the automotive, construction, agricultural equipment companies and its suppliers.
Technalysis can fully support or compliment client engineering capabilities on problems related to flow, heat transfer, noise, vibration, stress, electromagnetic and materials processing in product design and manufacturing.
Specific experience areas includes analysis and design improvement of the following components, systems and processes:
Engine components
Cooling systems
Brakes and clutches
Turbines and compressors
Torque converters
Water pumps
Pumps and valves
Climate control
Electric motor cooling
Fan design
Underhood cooling
Exhaust systems
Emission control
Casting
Compression and injection molding
Extrusion "
Technalysis can fully support or compliment client engineering capabilities on problems related to flow, heat transfer, noise, vibration, stress, electromagnetic and materials processing in product design and manufacturing.
Specific experience areas includes analysis and design improvement of the following components, systems and processes:
Engine components
Cooling systems
Brakes and clutches
Turbines and compressors
Torque converters
Water pumps
Pumps and valves
Climate control
Electric motor cooling
Fan design
Underhood cooling
Exhaust systems
Emission control
Casting
Compression and injection molding
Extrusion "
Friday, March 17, 2006
Customized CAE Software
Customized CAE Software
Technalysis' Passage Software has been used within wide variety of industry applications. However, Technalysis can customize its Passage Software to specific needs. Technalysis has over 20 years of experience developing, customizing and supporting CAE software for many specific applications. Please contact us to discuss your requirements.
Technalysis' Passage Software has been used within wide variety of industry applications. However, Technalysis can customize its Passage Software to specific needs. Technalysis has over 20 years of experience developing, customizing and supporting CAE software for many specific applications. Please contact us to discuss your requirements.
Technalysis
Consulting Services - Passage® Software - Advance CAE & CFD Engineering - Fluid Flow and Thermal Analysis - System Optimizations and Component Design
Since 1985, Technalysis has been providing advanced CAE technology involving fluids, materials and manufacturing processes within wide range of industrial applications with its Technalysis® Consulting and Passage® Software.
Technalysis specializes solving complex fluid flow and heat transfer problems using computational fluid dynamics (CFD) and other advance CAE solutions.
Technalysis' CAE - CFD flow modeling capabilities can fully support or complement and enhance clients engineering capabilities in product design and manufacturing
Since 1985, Technalysis has been providing advanced CAE technology involving fluids, materials and manufacturing processes within wide range of industrial applications with its Technalysis® Consulting and Passage® Software.
Technalysis specializes solving complex fluid flow and heat transfer problems using computational fluid dynamics (CFD) and other advance CAE solutions.
Technalysis' CAE - CFD flow modeling capabilities can fully support or complement and enhance clients engineering capabilities in product design and manufacturing
PASSAGE®/SYSFLOW Software
Fluid Flow Software and Simulation Network Modeling - System Analysis
PASSAGE®/SYSFLOW Software is a one-dimensional System Fluid Flow and Heat Transfer Analysis program for the prediction of flow network performance.
PASSAGE®/SYSFLOW Program provides very useful information in understanding the flow splits in branched flow passages and the overall heat fluxes between components. A 1D flow software is a very efficient and a relatively inexpensive tool for design and analysis.
PASSAGE®/SYSFLOW Program is fast, user-friendly and effectively predicts performance in a variety of user-defined networks.
Steady state, compressible and incompressible flow network problems can be solved including heat transfer effects.
Virtually any flow network system and/or sub-system can be modeled using combinations of components included in the standard library.
A numerical model such as PASSAGEâ/SYSFLOW serves as an invaluable tool to study the flow and heat-transfer in complex systems and to optimize the design process in a more cost effective and timely fashion.
PASSAGE®/SYSFLOW Software is a one-dimensional System Fluid Flow and Heat Transfer Analysis program for the prediction of flow network performance.
PASSAGE®/SYSFLOW Program provides very useful information in understanding the flow splits in branched flow passages and the overall heat fluxes between components. A 1D flow software is a very efficient and a relatively inexpensive tool for design and analysis.
PASSAGE®/SYSFLOW Program is fast, user-friendly and effectively predicts performance in a variety of user-defined networks.
Steady state, compressible and incompressible flow network problems can be solved including heat transfer effects.
Virtually any flow network system and/or sub-system can be modeled using combinations of components included in the standard library.
A numerical model such as PASSAGEâ/SYSFLOW serves as an invaluable tool to study the flow and heat-transfer in complex systems and to optimize the design process in a more cost effective and timely fashion.
PASSAGE®/Compression Software
PASSAGE®/Compression Software
· PASSAGE®/COMPRESSION Software is a finite element program for the mold filling simulation of complex three-dimensional, thin-walled parts.
· Flow models include: Barone-Caulk hydrodynamic friction and generalized Newtonian fluid to simulate the non-isothermal filling of SMC, BMC, and glass; fiber orientation for SMC and curing kinetics for thermosets.
· A high-pressure in-mold coating simulation option is also available.
· A user-friendly preprocessor allows mesh generation and capability to accept externally generated
meshes with interactive entry of process conditions and numerical control parameters.
· Results are viewed with an interactive post-processor that features dynamic rotation and zooming animation of results, and viewing options for color contour and vector plots.
· PASSAGE®/COMPRESSION Software is a finite element program for the mold filling simulation of complex three-dimensional, thin-walled parts.
· Flow models include: Barone-Caulk hydrodynamic friction and generalized Newtonian fluid to simulate the non-isothermal filling of SMC, BMC, and glass; fiber orientation for SMC and curing kinetics for thermosets.
· A high-pressure in-mold coating simulation option is also available.
· A user-friendly preprocessor allows mesh generation and capability to accept externally generated
meshes with interactive entry of process conditions and numerical control parameters.
· Results are viewed with an interactive post-processor that features dynamic rotation and zooming animation of results, and viewing options for color contour and vector plots.
Discrete Element Method (DEM)
Discrete Element Method (DEM) Software and Consulting by Technalysis
PASSAGE®/DEM is for predicting the flow particles under a wide variety of forces.
Some features of Passage Discrete Element Modeling Program:
Equations of motion are solved for translation and rotation of individual particles traveling in electrostatic, magnetic, or gravitational fields.
The size of the particles can be in the order of microns or larger. All appropriate forces are included in the formulation.
The particles can be of different shape and size with a given distributions.
The particles can carry charge. Individual charging of particles are calculated.
Different properties of the particles such as charge, temperature, etc. can be predicted by tracking the motion of each particle.
Different types of boundary surfaces can be modeled whether they are stationary or moving.
A user-friendly pre- and post-processor is provided to input the geometry of the boundaries and the particles, as well as the display of motion and other properties of the particles.
Structural deformations of rollers, belts driving the particles are also included in the models.
Runs on PC-based Workstations.
Technalysis offers customization of PASSAGE®/DEM to meet specific customer needs.
PASSAGE®/DEM is for predicting the flow particles under a wide variety of forces.
Some features of Passage Discrete Element Modeling Program:
Equations of motion are solved for translation and rotation of individual particles traveling in electrostatic, magnetic, or gravitational fields.
The size of the particles can be in the order of microns or larger. All appropriate forces are included in the formulation.
The particles can be of different shape and size with a given distributions.
The particles can carry charge. Individual charging of particles are calculated.
Different properties of the particles such as charge, temperature, etc. can be predicted by tracking the motion of each particle.
Different types of boundary surfaces can be modeled whether they are stationary or moving.
A user-friendly pre- and post-processor is provided to input the geometry of the boundaries and the particles, as well as the display of motion and other properties of the particles.
Structural deformations of rollers, belts driving the particles are also included in the models.
Runs on PC-based Workstations.
Technalysis offers customization of PASSAGE®/DEM to meet specific customer needs.
Technalysis® Advantage
Technalysis® Advantage
Over 20 years of consulting expertise in computer-aided engineering (CAE) and software development
One resource for both consulting and software for solving complex problems and developing advance CFD & CAE Programs.
Availability of 1D and 3D software for both system and component level analysis approach
Availability of customized software and support per clients need
Technalysis is committed to support its clients based on their both short term and long term needs:
In short term:
Technalysis can support clients by identifying and resolving performance issues per clients need
Technalysis can help client understand the effect of design parameters before building and testing
Reduce time and cost of development and improve product performance
In long term:
Technalysis can provide client technology transfer via custom software for use as a design tool to model client's products and processes
Provide Technalysis® Engineering capabilities to maintain clients leadership in core technologies through long term partnership
Over 20 years of consulting expertise in computer-aided engineering (CAE) and software development
One resource for both consulting and software for solving complex problems and developing advance CFD & CAE Programs.
Availability of 1D and 3D software for both system and component level analysis approach
Availability of customized software and support per clients need
Technalysis is committed to support its clients based on their both short term and long term needs:
In short term:
Technalysis can support clients by identifying and resolving performance issues per clients need
Technalysis can help client understand the effect of design parameters before building and testing
Reduce time and cost of development and improve product performance
In long term:
Technalysis can provide client technology transfer via custom software for use as a design tool to model client's products and processes
Provide Technalysis® Engineering capabilities to maintain clients leadership in core technologies through long term partnership
Wednesday, March 15, 2006
CAE - Freeze Drying Software
PASSAGE/FreezeDrying Software is a workstation-based finite-element modeling software aimed at assisting the user and designer of freeze-drying processes in improving the quality of freeze-dried products in pharma-ceutical and food processes. Both axisymmetric models of vials and planar two-dimensional cross-sectional models of pan drying processes may be modeled including the effects of shelve temperature, chamber pressure, convection, and radiation in freeze-drying ovens ... more
Discrete element method - Wikipedia, the free encyclopedia
Discrete element method - Wikipedia, the free encyclopedia: "Discrete element method
From Wikipedia, the free encyclopedia
Jump to: navigation, search
The term discrete element method (DEM) is a family of numerical methods for computing the motion of a large number of particles like molecules or grains of sand. The method was originally applied by Cundall in 1971 to problems in rock mechanics. The theoretical basis of the method was detailed by Williams, Hocking, and Mustoe in 1985 who showed that DEM could be viewed as a generalized finite element method. Its applications to geomechanics problems is described in the book Numerical Modeling in Rock Mechanics, by Pande, G., Beer, G. and Williams, J.R.. Good sources detailing research in the area are to be found in the 1st, 2nd and 3rd International Conferences on Discrete Element Methods. Journal articles reviewing the state of the art have been published by Williams, and Bicanic (see below). A comprehensive treatment of the combined Finite Element-Discrete Element Method is contained in the book The Combined Finite-Discrete Element Method by Munjiza. The method is sometimes called molecular dynamics (MD), even when the particles are not molecules. However, in contrast to molecular dynamics the method can be used to model particles with non-spherical shape. The various branches of the DEM family are the distinct element method proposed by Cundall in 1971, the generalized discrete element method proposed by Hocking, Williams and Mustoe in 1985, the discontinuous deformation analysis (DDA) proposed by Shi in 1988 and the finite-discrete element method proposed by Munjiza and Owen in 2004.
Discrete element methods are processor intensive and this limits either the length of a simulation or the number of particles. Advances in the software are beginning to take advantage of parallel.... more at http://en.wikipedia.org/wiki/Discrete_element_method
From Wikipedia, the free encyclopedia
Jump to: navigation, search
The term discrete element method (DEM) is a family of numerical methods for computing the motion of a large number of particles like molecules or grains of sand. The method was originally applied by Cundall in 1971 to problems in rock mechanics. The theoretical basis of the method was detailed by Williams, Hocking, and Mustoe in 1985 who showed that DEM could be viewed as a generalized finite element method. Its applications to geomechanics problems is described in the book Numerical Modeling in Rock Mechanics, by Pande, G., Beer, G. and Williams, J.R.. Good sources detailing research in the area are to be found in the 1st, 2nd and 3rd International Conferences on Discrete Element Methods. Journal articles reviewing the state of the art have been published by Williams, and Bicanic (see below). A comprehensive treatment of the combined Finite Element-Discrete Element Method is contained in the book The Combined Finite-Discrete Element Method by Munjiza. The method is sometimes called molecular dynamics (MD), even when the particles are not molecules. However, in contrast to molecular dynamics the method can be used to model particles with non-spherical shape. The various branches of the DEM family are the distinct element method proposed by Cundall in 1971, the generalized discrete element method proposed by Hocking, Williams and Mustoe in 1985, the discontinuous deformation analysis (DDA) proposed by Shi in 1988 and the finite-discrete element method proposed by Munjiza and Owen in 2004.
Discrete element methods are processor intensive and this limits either the length of a simulation or the number of particles. Advances in the software are beginning to take advantage of parallel.... more at http://en.wikipedia.org/wiki/Discrete_element_method
Tuesday, March 14, 2006
Fluid Flow Software - Flow Modeling - Passage Sysflow for the prediction of network performance.
Fluid Flow Software - Flow Modeling - Passage Sysflow for the prediction of network performance.: "Fluid Flow Software and Simulation Network Modeling - System Analysis PASSAGE/SYSFLOW Software is a one-dimensional System Fluid Flow and Heat Transfer Analysis program for the prediction of flow network performance.
PASSAGE/SYSFLOW Program provides very useful information in understanding the flow splits in branched flow passages and the overall heat fluxes between components. A 1D flow software is a very efficient and a relatively inexpensive tool for design and analysis.
PASSAGE/SYSFLOW Program is fast, user-friendly and effectively predicts performance in a variety of user-defined networks.
Steady state, compressible and incompressible flow network problems can be solved including heat transfer effects.
Virtually any flow network system and/or sub-system can be modeled using combinations of components included in the standard library.
A numerical model such as PASSAGESYSFLOW serves as an invaluable tool to study the flow and heat-transfer in complex systems and to optimize the design process in a more cost effective and timely fashion."
PASSAGE/SYSFLOW Program provides very useful information in understanding the flow splits in branched flow passages and the overall heat fluxes between components. A 1D flow software is a very efficient and a relatively inexpensive tool for design and analysis.
PASSAGE/SYSFLOW Program is fast, user-friendly and effectively predicts performance in a variety of user-defined networks.
Steady state, compressible and incompressible flow network problems can be solved including heat transfer effects.
Virtually any flow network system and/or sub-system can be modeled using combinations of components included in the standard library.
A numerical model such as PASSAGESYSFLOW serves as an invaluable tool to study the flow and heat-transfer in complex systems and to optimize the design process in a more cost effective and timely fashion."
Passage DEM Software- Discrete Element Modeling - Particle Flow Simulation
Passage DEM Software- Discrete Element Modeling - Particle Flow Simulation: "Discrete Element Method (DEM) PASSAGE/DEM is for predicting the flow particles under a wide variety of forces.Some features of Passage Discrete Element Modeling Program:
Equations of motion are solved for translation and rotation of individual particles traveling in electrostatic, magnetic, or gravitational fields.
The size of the particles can be in the order of microns or larger. All appropriate forces are included in the formulation.
The particles can be of different shape and size with a given distributions.
The particles can carry charge. Individual charging of particles are calculated.
Different properties of the particles such as charge, temperature, etc. can be predicted by tracking the motion of each particle.
Different types of boundary surfaces can be modeled whether they are stationary or moving.
A user-friendly pre- and post-processor is provided to input the geometry of the boundaries and the particles, as well as the display of motion and other properties of the particles.
Structural deformations of rollers, belts driving the particles are also included in the models.
Runs on PC-based Workstations.
Technalysis offers customization of PASSAGE/DEM to meet specific customer needs.
Equations of motion are solved for translation and rotation of individual particles traveling in electrostatic, magnetic, or gravitational fields.
The size of the particles can be in the order of microns or larger. All appropriate forces are included in the formulation.
The particles can be of different shape and size with a given distributions.
The particles can carry charge. Individual charging of particles are calculated.
Different properties of the particles such as charge, temperature, etc. can be predicted by tracking the motion of each particle.
Different types of boundary surfaces can be modeled whether they are stationary or moving.
A user-friendly pre- and post-processor is provided to input the geometry of the boundaries and the particles, as well as the display of motion and other properties of the particles.
Structural deformations of rollers, belts driving the particles are also included in the models.
Runs on PC-based Workstations.
Technalysis offers customization of PASSAGE/DEM to meet specific customer needs.
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