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Community Champion of the Month - August, 2025
The Community Team would like to introduce the August Champion of the Month, Dr. R. B. B. Ovando. Dr. Ovando is a researcher and engineer working at the intersection of electromagnetism, heat transfer, fluid dynamics, materials (stress, mechanical and physical metallurgy), and numerical simulation. His work combines finite…
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Altair Education
Are there any extra education content if ı would reach the Hyperwork full packet. I cannot learn everything from SimLab student version's education package
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[SimLab] Heat Balance doesn't converge
Hello, I am trying to run a thermal simulation in SimLab Electronics Thermal. For some reason, both the thermal and CFD convergences reach 100%, but the Heat Balance remains stuck at 0%, even after 500 iterations in the log file. My initial setup is quite simple: I am simulating a semiconductor module mounted on a heatsink…
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why is the RBE constraints not working
Description: I am working on a structural analysis for a expansion tank and I created 3 RBE(following the tutorial) to give constraints like fixing points. But the result is that the tank is not properly fixed. What is the possible cause for this? is it because the bad meshing near the fixing points maybe? I don't know.
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Pressure is time dependent so which solution type
Hello, I need to do a simulation in Simlab that I need to set pressure on the inner surface of a expansion tank which is repeated for thousands of times for certain pattern, I am trying to figure out which solution type of analysis I should assign(transient analysis but specifically which in Simlab) to get a structual…
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Error # 291 in Direct Frequency Response using Student Version of Simlab
I am currently using the Student Version of Simlab, and while working with the Direct Frequency Response, I receive the following error: *** ERROR # 291 *** No output results requested for Frequency Response, Transient Analysisor Random Response. Note that displacements and stresses are disabled by default for such…
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CFD Solution does not find my mesh
hi everyone, Why is this happening, "Solution not contain corresponding mesh. Please include valid mesh"? i did the mesh and defined it in the solution as shown below: here is the cutplane of my mesh: *edit: Attach my simlab file. *For meshing and setup, i refered to Tutorials SL2420
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FSI Solid-Side Multiple Time Step Not Executed, Causing Fluid-Side TCP Error
Hello everyone, I am conducting a SimLab FSI (Fluid-Structure Interaction) analysis and encountered a problem. I would like to seek advice from experienced users. 1. Problem Description The solid side (OptiStruct) was set with multiple time steps, but in practice it does not execute exactly as specified. The fluid side…
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How to Map Heat Losses from Flux Solution to Flow Solution in SimLab?
Electrical appliances and devices generate heat losses known as joule losses which significantly influences the thermal behavior of a device or system. Ignoring this coupling can lead to inaccurate predictions, poor design decisions, and potential failures. Multiphysics modeling especially coupling electromagnetic and…
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In Simlab electroflo, what is the difference between geometry discretization and analysis mesh?
I am able to see hexa mesh generated in both the options. what is the use of such options and differentiate how they are unique.
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Predict Wireless Connectivity In and Around Homes Using Altair SimLab
Radio connectivity is ubiquitous and essential to our daily lives. It connects us with friends and family, provides access to social media and streaming, and enables collaboration with colleagues globally. As the digital thread becomes more prevalent, data flow within companies increases to help align colleagues and…
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Retrieve the material name associated with a body using scripting
Hello, I would like to write a script which retrieves the material set in the model tree for each body in the Model. Is there a way to do it? e.g. I would like to write a script which returns Material as 'Polymer_2' for the selected body
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Requesting for an example file/model that uses simlab.getProperty
Hello, I am using the Simlab python library for some automation. I would like to use the simlab.getProperty function from the library but I do not understand the syntax completely. Do you have an example file or additional details that you could share? Thank you, Aashish Product/Topic Name : Using Simlab 2025.1
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Simlab - E-motor - Selected bodies are not in xy plane
Hello, I've sketch a motor and mesh with motor mesh tool. When I want to update the solution with my mesh, I've this error : "Selected bodies are not in XY plane". I've check and all is in the same plane. I've also tried to move node and project on one plane to be sure but it doesn't change anything. Does somebody knows…
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[SimLab] 직각 삼각형 형태의 2D mesh 생성 방법
SimLab에서 Surface mesh를 생성하면 설정 옵션에 따라 약간의 차이가 발생할 수 있으나, 기본적으로는 정삼각형 형태의 tria 요소가 생성됩니다. 다음의 방법을 Mesh control을 미리 설정하시면 직각 삼각형 형태의 R-tria 요소를 생성하실 수 있습니다. 상단 Mesh » Mesh controls 클릭 Mesh pattern 클릭 후, Aligned mesh 선택 적용하고자 하는 face 모두 선택 후 적용
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Multi-Physics Material Selection for a Battery Pack Enclosure using Altair® Material Data Center™
As the electrification of transportation and energy systems accelerates, the battery pack has become one of the most critical components in modern engineering. While battery cells themselves often receive most of the attention, the enclosure that houses and protects these cells plays an equally vital role. It must maintain…
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Simlab Quick Drop Test Setup
Hi everyone, I'm working on a drop test simulation in Altair SimLab using the Quick Drop Test Setup. I noticed that when I define the drop test, the impact surface is automatically created just below the bottom face of the geometry. However, in the same setup, I also enter a drop height value (e.g., 5 feet), which the…
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SimLab - Multiple questions on meshing, CAD handling, and Abaqus setup
Hi everyone, I am working with SimLab and have encountered several questions I would like help with. I would really appreciate any guidance, tips, or references to documentation for the following: How to replace solid or surface mesh in SimLab? Does SimLab have tools to create 3D welds when the weld line is not straight…
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Trying to import CAD file freezes Altair Simlab
My workstation has a fresh install of Altair Simlab and I'm trying to import CAD files from Autodesk Inventor to do CFD simulation. But the program freezes instantly when trying to import a file and task manager shows the program as not responding and CPU usage is 0 %. Nothing happens even if I wait for an hour. I have…
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if its possible geometry cleanup in simlab for all models.
In simlab, we have the complex model to cleanup the surface of the geometry but we have the issue. "remove failed", "delete failed" unable to work in surface areas in simlab. What will do?kindly reply.
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Result not showing properly
Description: The result display a 2D picture Product/Topic Name : expansion tank simulation, simlab 2025 I am trying to do a simulation regarding one expansion tank, I imported 3D model and I set up the solution using non linear static type but after the run, the model shows as a 2D picture and I don't know why this…
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Simlab - identify body by thickness
Hi, I am trying to use 'Identify body by size' tool and filter bodies by providing thickness value. It seems to work for some bodies but other bodies are not selected even though their thicknesses are less than the value that I use. The unselected bodies (which should have been ideally chosen) consist of components that…
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Is it possible to input source terms in Simlab?
I am trying to simulate hydrogen absorption in Simlab, mimicking a metal hydride storage reactor. In order to achieve this I need to input two source terms S_t and S_m. S_m represents the hydrogen absorption rate and S_t represents the heat released due to the absorption. In Simlab in seems I can only input UDF's relating…
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Menu bar missing
I am trying to do a SimLab course with Altair Edu, and I seem to be missing some menu bars. After I install, I can see the following menus: However, after I activate my license, here is all I see:
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Magnetic-Transient solve stops with “ill-connected elements” although mesh check is clean
Hi everyone, I’m modelling an axial-flux machine (AFM) in SimLab 2025. My CAD is imported as a STEP file and meshed inside SimLab. I have already run three transient magnetic simulations successfully; the only difference between them was the magnet arrangement on the rotor. After applying a new magnet pattern the solve now…
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📅 June Community Roundup + Raffle Winner Announcement 🎉
Hello Members, I am excited to share all the amazing things that happened in our community in June. From product updates to celebrating our members' achievements, there is so much to catch up on. Plus, I am thrilled to announce our Raffle Winners. Let's go! Our Community Raffle Winners 🎉are @Altug Otsar @Aviral_Mishra…
