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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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Getting Results and contours from Post ribbon in Acu Solve
Hello. I am running the Altair Hyperworks CFD 2020.1 -Acu Solve program, performing a simulation on a racing vehicle. Having finished with Meshing and Solution without any problem. To make it easier for you, I inform you that I am following the steps from a tutorial entitled: " Evaluating aerodynamics with Altair CFD…
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Define AcuSolve run settings
Hello. I am new in the community and I am trying to get results from CFD. I use the program Altair Hyperworks CFD 2020.1 -AcuSolve. I have a problem in the Solution when I go to Run ribbon I cannot find the AcuRun path. I am following a tutorial " Evaluating aerodynamics with Altair CFD Solutions". In the video the AcuRun…
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How can positive displacement pumps be simulated with AcuSolve?
Is it possible to work with dynamic deformable grids in order to simulate positive displacement pumps?
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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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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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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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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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乱流運動エネルギーの単位
acusolve (HyperWorks CFD 2022.3)のPoint Probeで出力されるkinetic energyは乱流運動エネルギーと認識しておりますが、この単位はJでしょうかm2/s2でしょうか。
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AcuSolveでの流路トポロジー最適化について
ACU-T:7201/SL2501のチュートリアルを参考に，当方で対象とする形状について流路トポロジー最適化を試みています。 具体的には，一つの入り口に対して25の出口に広く分散する流路の最適形状を求めようとしているのですが，各出口の流量を入口流量の(1/25)+/-10%の拘束条件を設定しているにもかかわらず，ほとんどの流体が入口に近い数個の流路から排出され，その他の出口に向かう流路は形成されない結果となってしまいます。…
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Running SimLab on HPC without GUI
Hello, I'm trying to use SimLab on a HPC, but I'm not sure how to run a simulation via command prompt without the GUI. I'm able to set up the case, it's just a matter of calculating. I'd like to run simulations using SimLab by itself (using AcuSolve), as well as SimLab coupled with EDEM. Any advice would be greatly…
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Looking for a demo model of AcuSolve electronics thermal simulation
Hello! I am looking for a ready-to-run demo model of electronics box. This simulation would be done with SimLab+AcuSolve and ideally contain a cooling fan.
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Is the boiling model in Acusolve possible to model film boiling?
Hi Experts, As mentioned in the title, I'm wondering that the applicability of this boiling model outside the nuclear boiling range (i.e. natural convection boiling, transition boiling and film boiling). Thanks and regards, Gary
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Getting a high error in HTC for coolant jacket compared with ANSYS. Please check the file attached
I am trying to estimate the heat transfer coefficient for coolant jacket. Please verify the process followed. You may check the attached file for more details. I am getting a different value compared with ANSYS CFD with a relative error>100%. Seek your observations on this matter.
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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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動的サロゲートモデルromAIと高速物理予測physicsAIのCFDへの適用 / 自動車技術会フォーラム 2024オンライン冬季 講演資料
自動車技術会フォーラム 2024オンライン冬季にて、 「動的サロゲートモデルromAIと高速物理予測physicsAIのCFDへの適用」 とうタイトルで講演させていただきました。 【24-W4】自動車開発におけるデータ駆動型CFDの課題と将来｜公益社団法人自動車技術会 講演資料をアップロードしましたので、添付pdfファイルをご参照ください。 physicsAIの紹介 幾何学的深層学習（Geometric Deep Learning）を活用して、形状の変化に対する高速な性能予測を実現する手法です。 romAIの紹介…
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Integration of Current Density
Hi all! In Simlab, I have made a flow simulation with electrical effects. The output includes the current density. However, I am interested in the total current through a surface. In theory, the current is the integral of the current density over the surface elements of a surface. Similar integration must have already been…
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Add radiation to tutorial ACU-T 6103 AcuSolve - EDEM Bidirectional Coupling
Hello, I have tried the tutorial ACU-T 6103 AcuSolve - EDEM Bidirectional Coupling with Heat Transfer And I was able to use the bidirectional coupling for my system, where I have a horizontal cylinder filled with some ceramic particles in contact with the cylinder wall. My cylinder is at ~600K, so I want to consider the…
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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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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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CFD Simulations Made Faster Leveraging AI: A Dive Into Industrial Mixers
This article was co-written by Spiros-Foivos Mallios & Georgios Giannakouros. Abstract In this article, we will discuss how to speed up CFD simulations leveraging AI-Enabled Reduced-Order Modeling. More specifically we will focus on the mixing process of an industrial tank. The goal is to enable fast predictions of the…
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Reducing Tube from 3D to 2D
Hello everyone! SimLab with AcuSolve is my first experience with thermal and flow simulations, so I am starting from simpler geometries, before moving to anything more complicated. The first thing I need to simulate is the flow and heating of initially room-temperature gas in a hot narrow tube. Of course, it is possible to…
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Timestep size & Max Stagger Iterations
Hello everyone, 1. For vortex shedding simulation (transient), how should I know if my max stagger iterations value is 'enough' or not? what is the good starting value of max stagger iterations. 2. For example: my timestep size is 0.002 + max stagger iterations = 10, if i want to decrease my timestep size to 0.001, should…
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How to more easily export AcuProbe results from multiple simulations of SimLab? Also, what kind of r
Hello experts, I've been running a large number of simulations in SimLab and need to export the AcuProbe results for each one. Currently, I have to open the log of each simulation and manually export the results, which takes me around 2 hours or more just for this task. Here you can see a folder showing a quarter of the…