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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…
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How to choose the Boundary Layer Thickness, Boundary Layer Mesh and No of Boundary Layer in CFD
Hi, I Performing a CFD analysis for an Air blower Model. Here I meshed Model with some Element size and Tetra 3d Mesh Type. But here How to choose the Boundary layer mesh Size, No of layer and thickness.
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Why is the section plane moving in visualization mode (Post) ?
I have an issue related to the visualization of a CFD analysis. When I put a section plane and animate it, it moves, instead of showing the movement "inside" of it. Such as the current movement as the time passes. Before, when I was studying an individual piece it would let me, but now I have this big cluster of pieces and…
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What does it mean by checking arguments?
Trying to simulate flow through an accumulator, I'm not sure if this means my set up is wrong, but any help would be appreciated.
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How to fix this acusolve error?
I am using simlab and acusolve to measure air flow through an accumulator. The mesh is created ( as you can see) but for some reason I get this message when I try to update the study. Any idea what I did wrong or how to get around this?
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HyperMESH CFD 2024.1 downloading in laptop
Hello to everyone I have downloaded the HyperMESH CFD 2024.1 application to my office PC and to my laptop but something went wrong. I can't run the application from the laptop because there is a problem with Host recognition and appears a message about dll directory. Thanks to all
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I need help with my airfoil simulation
Hi guys, so im trying to simulate the diffeences between the same profile (intact vs impacted but not with a hole) at different Angles of attack I'll attach all the pictures of mesh and run parameters +log. Some ppl before told me to get a even finer mesh so i runned this imulation that took me 8 hours (i think is too much…
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How to apply constant temperature boundary condition to a volume?
Hello experts, I'm trying to perform steady state conjugate heat transfer analysis where I want specify constant temperature a solid volume and study its impact on the surroundings. I am requesting your support with this. Thanks and Regards, Jagan
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Automation with few parameters
Hi experts! I am trying to automate few simulations with different inputs. I am trying to do with a geometry from de tutorial: "Mixing Elbow". This geometry has two velocity inlets that i want to change in each simulation. My excel table is something like this: ID VEL_LONG VEL_SMALL 412 0.4 1.2 512 0.5 1.2 612 0.6 1.2 413…
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AcuRun Issue
Hi, I have constructed an air duct in Hyperworks Desktop 2022 and I would like to run Acusolve to view my result. However, I cannot really trace the AcuRun pathway in the file. I tried to download Acusolve individually and copy the hwcfdsolvers pathway to the software, but it does not have the options to autorun the…
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Issue on running Solver Job Launcher
Hi, for your information, my university is using Altair hyperworks desktop 2022 for Computer Aided Engineering for teaching. Recently I was assigned to run Acusolve to analyse an air duct, but my Acusolve does not auto run AcuProbe and AcuTail, results that I cannot review my result. Can anyone assist me on this issue ?…
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UDF for body force
Hello, I found that there was an issue to apply gravitational force (x, y, z) from test data. (simlab 2024) Multiplier function support only 1 direction of time-dependent data. (2 column array, time versus data). I was trying to use momentum source command (it support 4 column array). However, time variable was not…
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Convert results from HyperMesh CFD to Ensight or x3d
Hi experts! I am trying to convert the results that HyperMesh gave me to the ensight format or .x3d. I have seen that ther is a tool to make it called 'acuTrans' that is to translate the AcuSolve solution output to other formats and I have put on AcuSolve this line acuTrans -pb ACU-T1000_Manifold.1.Log -to ensight but it…
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Wall boundary condition in AcuTrace
Hi, experts. In the analysis results (animation) by acutrace of the tutorial ACU-T: 6000 Static mixer, the particles do not appear to be reflected by the wall set as the reflecting wall. Even in my own model (analysis of particle behavior in a tank filled with water in a single-phase flow), reflection does not occur on the…
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Problem executing acuRun
Hi experts! I'm trying to execute the example of the step-by-step ACU-T1000_manifold in acuSolve cmd prompt. The sentence that i have put on it is the following: acuRun -np 4 -inp ACU-T1000_manifold.inp The response: acuRun: ***ERROR: undefined problem I have copied the acuSolve.exe and acuRun.bat to the working directory…
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Streamline of particles in AcuTrace
Hi, experts. I understand that in order to plot particle trajectories (streamline) as the analysis results of AcuTrace, it is necessary to obtain streamline data, as described on the page at the following URL. I have the following questions regarding this.…
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2nd order time integration
Hi everyone, Is 2nd order time integration sensitive to CFL Number? Does user need to set CFL < 1 if using 2nd order?