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Simlab software Crash During CFD Mesh for Vehicle AC Duct Simulation
Hello Altair Support Team, I want to perform a vehicle AC duct simulation, but I am facing an issue where the software crashes after starting the CFD meshing process. I have tried multiple iterations, but the software continues to crash. When I separate the HVAC unit and duct geometries, the volume mesh completes…
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Is it possible to do Transient thermal analysis of a motor in 2D ???
Hi everyone, I am currently working on a motor design project and have successfully completed the 2D Electromagnetic Analysis in SimLab. My goal is to perform a Transient Thermal Analysis while keeping the workflow in 2D to optimize solve times. I am running into two specific hurdles: Cooling Channel Definition: When…
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Is it possible to perform 2D CFD analysis in Simlab ??
Hi everyone, I am working on a motor and have completed the 2D electromagnetic design in SimLab. Now, I need to perform a thermal analysis to identify internal hotspots and verify the effectiveness of my water cooling. My strategy is to start with a 2D workflow for fast iterations before moving to a full 3D model. I have…
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Export .inp file from SimLab
Instead of running the CFD simulation using Simlab GUI, can i instead run it using Altair compute console? if i can, how to generate the Acusolve .inp file?
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CFL number in Post-processing
HI everyone, I want to investigate the effect of timestep size based on CFL number (from 0.5 - 10). May i know where can i get the value of CFL during post processing? I only found "CFL timeInc" in the log file but i dont think this is the CFL value. I am expecting to see average, min and max CFL.
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In HypermeshCFD post-processing, how can I extract data for a specific region?
I want the average velocity within the red selection box, not the average for the entire cross-section. How should I proceed with the selection?
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How to define the Aspect Ratio for a non-spherical drag model in CFD-DEM.
I learned from the sieve_base case in Tutorial 6A — Particle Separation in a Harvester, that defining a non-spherical drag model requires defining the Aspect Ratio. However, I am now encountering particles where the length, width, and height are all different, such as elliptical disk-shaped particles or irregular…
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The model doesn't have volume mesh! Please mesh the model and try exporting again., pls help
Hi , i'm trying to make a aerodynamic simulation with Hwcfd 2026 and acusolve of my civic to work on some aero but i try to replicate the tutorial , they applicate a surface mesh , bondary layer control and they mesh it to have a volume then they run it and boom, me when i run it it say this error can someone pls explain…
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Split faces of a 3D Mesh - SimLab v2025.1
Hello! I need to carried out a CFD simulation and I'm using SimLab v2025.1. I've imported the mesh in the program, but I've a problem with the application of the boundary condition. For convenience, I created a very simple model (Cavity), which has the same problem. It is a simple box (screenshot), the inlet face is the…
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What’s New in EDEM 2026 – Release Highlights
Altair® EDEM™ continues to set the industry standard for the Discrete Element Method(DEM). Now more powerful and user-friendly than ever, EDEM 2026 showcases our commitment to advancing optimization and simulation-driven design by delivering new key features for physics modeling and customization. With this latest release,…
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Is it not possible to show wall shear stress results when running laminar flow in HyperMesh CFD?
I am running a internal pipe flow simulation in HyperMesh CFD 2025 with the Acusolve solver. My flow is laminar, but then I cannot show wall shear stress results in post processing which I want. I can only see it when I use a turbulence model.
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Differences among hm and hw tools
Product/Topic Name : HyperMesh, HyperMeshDesktop, HyperWorksDesktop, HyperMeshCFD, HyperWorksCFD I need help to understand the differences among the tools HyperMesh, HyperMeshDesktop, HyperWorksDesktop, HyperMeshCFD, HyperWorksCFD and why are the ribbons all meshed up among versions? It is very confusing. If I understand…
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Unified Workflow for EDEM - AcuSolve Coupling in SimLab
SimLab is a process-oriented multidisciplinary simulation environment to accurately analyze the performance of complex assemblies. Multiple physics including structural, thermal, electromagnetics, and fluid dynamics can be easily setup using highly automated modeling tasks, helping to drastically reduce the time spent…
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Fluidized Bed Two-Way Coupling Simulation: Particle Explosion
Description: I am currently working on a simulation of a fluidized bed with paddle stirring. I am encountering an issue where the calculation only works when the medium is air and the inlet velocity is less than or equal to 17 m/s. If these conditions are not met—for example, if a fluid with higher density is used or the…
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How to mirror the CFD results with Hyperworks CFD
Dear Community, I would like to ask for a support how to mirror the Acusolve CFD results. I have a half model of an aircraft and I would like to make a nice full aircraft plots without needing to re-run the model with mirrored geometry. Unfortunately mirroring results option does not seem to exist in Hyperworks CFD. thanks…
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EDEM and HYPERMESH CFD Coupling
Hello everyone, I'm new here and really excited to be part of this community. I'm currently working on mercury free gold recovery project of which I want to use EDEM and ACUSOLVE couple DEM CFD. I already have CAD of goldkacha which I used solidworks. If anyone has experience with this or can point me in the right…
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Zero gradient boundary in Acusolve
Hi experts, I am simulating a case involving a variable-density fluid propagating in a water tank, and I need to set an outlet at the end of the tank. I tried using a pressure outlet boundary condition (considering hydrostatic pressure), but the results were not very good. Now I want to use a zero-gradient boundary…
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EDEM flexible surface
Hello, everyone in the community. I currently want to do a flexible model of corn leaves ( in line with the actual physical behavior, such as bending ) in EDEM, as if hypermesh and EDEM co-simulation can be done. Do you have this information ?
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what are the difference between coupled solution and the structural solution with mapped temperature
I noticed that the results from the same models with coupled solution and the structural solution with mapped temperature and pressure are different(from pdf of heat transfer analysis training), is it because that within the coupled solution, the displacements of the model will be sent to flow solver to recalculate the…
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CFD-DEM Simulation of a Tablet Coater with Heat and Mass Transfer
Please find the AcuSolve-EDEM geometry files below: https://us.v-cdn.net/6038102/uploads/S8ZX4NMLHIHZ/tablet-coater-geometry.zip Tablet coaters are vital pieces of equipment in the pharmaceutical and nutraceutical industries, widely used to apply a uniform coating layer on tablets for functional or aesthetic purposes. This…
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Why do particles with temperature generate negative temperature particles in the bidirectional coupl
When I generate particles with temperature in the bidirectional coupling between Acusole and EDEM, negative temperature particles will be generated.
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Question about Acusolve-EDEM coupling
Dear experts, I would like to raise a question regarding Acusolve-EDEM coupling. As we know, the volume filtering method is employed to handle the fluid-particle interaction calculations during coupled simulations. However, if I want to simulate variable-density fluids (such as reactive flows, saline flows, etc.), has the…
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How to keep ambient air of constant temp in Simlab acusolve (lets say 100 degC)?
The red arrow marked box shown below is to be tested at an ambient temp of 100 C. How to give constant temp to the ambient air ? (I have considered the ambient air as a solid surrounding the box)
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Question about Acusolve-EDEM coupling
Dear experts, I would like to raise a question regarding Acusolve-EDEM coupling. As we know, the volume filtering method is employed to handle the fluid-particle interaction calculations during coupled simulations. However, if I want to simulate variable-density fluids (such as reactive flows, saline flows, etc.), has the…
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acusolve-edem
I am conducting a dynamic mesh simulation. In AcuSolve, I need to use a UDF (User-Defined Function) to obtain geometric information from EDEM. Could you please provide relevant materials that explain how to write the corresponding UDF?Thanks！
