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Hypermesh CFD: CAD geometry is shallow inside
Hi! When I import a CAD geometry into HyperMesh CFD, it appears shallow or hollow, even though it is actually a fully filled solid volume. Does someone know why this happen? What do I need to do to solve this? For materials, I need to add the inside volume (in red) as material 1 and the walls volume (in graw) as material…
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In HyperMesh is there a way to use the code gathered using developer>recording option in Python?
Hello everybody, Since HyperMesh has an internal kernel and import modules such as hm are recognized in this kernek but since python doesn't recognize such modules. The code gathered through recording can only be used on HyperMesh's Python environment. I was wondering if there was a way to somehow implement this code to…
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Meshing issues in HMCFD
Hi, One of our clients is experimenting issues when he goes for meshing his CAD part for CFD analysis : " I created the volume and now I am trying to mesh a CAD part for CFD simulation. However when I try to run the mesh, the process stops. Can you tell me what is the matter? " I joined his stp file but i cant add his…
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Flow of highly viscous fluid thorugh small annular ring.
I am trying to simulate flow between two seperate chambers connected by an annular passage (OD 17mm and ID 14mm) and two orifices of diameter 2.5 mm each (As shown in the sectional view given). I am using a fluid of dynamic viscosity 4.85 Pa.s (kinematic viscosity = 5000 cSt). In the subsequent simulations I have to reduce…
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EDEM Post-processing: How to analyze your EDEM simulation results
Once an EDEM simulation has finished running, you will need to move onto post-processing your EDEM results. For this, there are multiple options available depending on your model. Here is a breakdown of the options available: Altair EDEM Analyst - The most complete option to analyze the bulk material Altair HyperView -…
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Humid air and outlet - vehicle cabin analysis
Good day experts of Altair, hope everyone its doing great currently I´m trying to simulate a thermal comfort analysis for a cabin but I´m facing some problems and I would like advise from you: 1- First, im getting an error showed in the attached image related with the humid air which makes me think that may be Im not doing…
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Problem opening .log file for Hypermesh CFD
I have run a simulation in Hyperworks CFD but when I try to open the .log file it comes up with an error. I've attched the error message. I've tried a few things like ensuring all the relevant files are in the same location and trying to covert the file but it couldn't load the data to do that. Any possible solutions would…
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How to know a CFD Analysis solution get converged or not?
Hi , I have been conducting a CFD analysis of the air blower model using Simlab and the Acusolve solver. To estimate the first layer height of the boundary layer, I utilized the HM CFD Y+ calculator. Using this first layer height, I generated volume meshes with 5, 8, and 12 boundary layers, employing maximum mesh sizes of…
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Community Champion of the Month - February, 2025
The Community Team would like to introduce the February Champion of the Month, Jagan Adithya Elango @Jagan . Jagan is a Design Engineer who is passionate about solving engineering challenges by applying his knowledge of CFD, thermodynamics, fluid mechanics, and heat transfer. He has experience modeling conjugate heat…
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Problem to parameterize my model on Hypermesh
I want to create a rectangular box in Hypermesh CFD to be used as a cooling system. There will be an inlet and an outlet for the fluid entering and exiting the box. Inside the box, there are N cylinders, each with three parameters: their diameter, their x-coordinate, and their y-coordinate in the rectangular plane. I can…
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how to capture flow stream line of rotating component?
"In HyperWorks CFD 2022.3 , I am facing an issue while plotting streamlines for the internal fluid cavity used for lubrication purposes. The problem is transient in nature, and the pin rotates about the sub-axis. How can I capture the changes in velocity, pressure drop and rise, and mass flow rate in the streamlines?
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Hypermesh Library 2019.1.7 Unresolved Symbol Errors
Hello, I am new to using Altair hypermesh and am working with a legacy codebase from 2014 which used the hm.lib hmin.lib hmreslib.lib and hmmodlib.lib libraries. When I try to build the code I run into LNK2001 unresolved external symbol HMRES_displacementadd posthv addForceVector.obj When I check the library file using the…
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Convergence validation on transient simulation
Good day Altair community, I'm looking for some advice about the interpretation of the residual and solution graphs, I´m struggling to determine if my simulation is converging. I used a convergence tolerance of 0.0001 since default tolerance didn´t give me the precision I was looking for on the results. So, according with…
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Relaxation factor
Good day, could anyone explain me how can I modify the relaxation factor in Hypermesh CFD? I´m performing a transient simulation.
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Boolean Operation not working in Simlab.
Hi , I am using Simlab to extract the fluid volume for My cad Model. For enclosed volume I Offset the surfaces of mating region for two parts. It was intersecting each other. But, i am trying to combine the parts. It shown Boolean operation failed. Is there any specific conditions for Boolean the solids ? Thanks & Regards,…
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믹서 해석 모델 Example 문의
수직방향으로 회전하는 용기 (원통)에 분체를 넣고 혼합하는 해석 모델을 다운로드 받을 수 있을까요? 정확히는, 회전하는 용기 내 블레이드가 한쪽 면에 부착되어 있어 블레이드가 회전하면서, 용기 자체를 회전시키거나 정지시키면서 다수 분체가 어떻게 혼합되는지 모델링하고 싶습니다. 유사하게 모델링한 작업이 혹시 있으시면 공유 부탁드립니다. 감사합니다.
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BOUNDARY LAYER SIZE IN SIMLAB
Hi, I am performing a CFD Analysis of Air blower using SIMLAB to find the Flow rate of it. I have done my meshing. But I have some doubt in Boundary and its size. For Air blower model, How to choose the Boundary layer thickness and first layer height. If I choose Y+ based, I am having HM CFD, Y+ calculator is there. In Y+…
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CFD MESHING ISSUE IN SIMLAB
Hi I am trying to Mesh a Air blower model in Simlab. After I plugged the fluid regioand MRF Zone, I done the Surface meshing. Then I am trying to do cfd meshing. In CFD meshing, I select the the Fluid Body as plugged fluid volume and mrf zone, then Ignore BL surface as Inlet, outlet and MRF zone surfaces. If I click ok, It…
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Perl for Acusolve - LINUX (UBUNTU 24.04)
Hi, I am running the following tutorial for HyperMesh CFD for LINUX: For which I installed HyperMesh CFD and AcuSolve. The installation went well on ubunutu 24.04, No problems reported. But lunching AcuSolve I got the following message: You need Perl on your system before you can launch AcuSolve.You may obtain Perl from…
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Calculating the Porosity of Irregularly Shaped Particle Piles
Hi all, My case involves CFD-DEM coupled analysis, mainly simulating particle backfilling into water during land reclamation. Under these conditions, the final shape of my particle pile is not rectangular or circular but rather irregular. Are there other methods to conveniently calculate the porosity of the particle pile?…
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Boundary Condition Selection of Interface Surface
Hello community members, I have a question. When we've seperated a solid partition from the main volume. Which boundary condition should be applied to the interface surface of two solids in Altair CFD 2022.3. To summarize; I'm first running my model with MRF in Steady simulation. Then projecting my result to initiate…
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Having problems meshing a surface
Currently working on a car model in Hypermesh CFD Had a lot of problems with geometry, and I finally got it cleaned up and did the box. Then there were a lot of problems with meshing of some group of surfaces, so I deleted them all and Validated my model. Now this side wall doesnt mesh and I dont know why. Link for the…
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Where is the acuRun.bat folder path on Hyperwork CFD?
I use Hyperwork CFD Student license. On tutorial and other post I see they have acuRun.bat from hwcfdsolvers folder.And my in my Student Edition I didn't see it. Is that limitations from student edition or I miss something. Because I am practicing the tutorial Manifold for Hypermesh CFD and If I don't know where it is, I…
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CFD DEM Modelling of a Cyclone Separator
A cyclone separator is a mechanical device that uses the principle of centrifugal force to remove particulates from air, gas or liquid stream without the use of filters. It is often employed in industrial processes to separate dust or other unwanted materials from fluid streams efficiently. Modelling these systems helps in…
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Is there any tutorial or demos available for Twin Activate 1D software?
Integration of 1d software with 3d CFD software application is required