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When using the Hypermesh CFD software to simulate the official website's "Supersonic Flow in a Conve
When using the Hypermesh CFD software to simulate the official website's "Supersonic Flow in a Converging-Diverging Nozzle" case, after setting the periodic boundary, an "error occurred executing acuPrep" situation occurred during the acuSolver operation. This is the error vlog. The problem lies in the set periodic…
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Mesh ratio size
hi everyone, case: 2D transient, flow over cylinder at Re = 20 000 - 100 000, SST Questions: What is the rule of thumb for mesh ratio size from edge to area of interest (nested mesh) to global mesh size? Should i use mesh ratio 1:2? For example, edge size = 1e-3 meter > nested mesh = 2e-3 meter > global = 4e-3 meter? is…
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Can I use reliably Altair products to simulate CFD on extreme flight conditions?
Description: Usage and limitations of Hypermesh and FlightStream for specific flight conditions in CFD analysis Product/Topic Name : Hypermesh, Hypermesh CFD, Hyperworks, FlightStream Hi everyone! My team is having difficulties evaluating the options with Altair softwares on CFD analysis on specific flight conditions. We…
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Someone can help me with de CFD purposes in diferent secctions of a formula student?
Hi everyone I`m newbie with this tool and I need some support to navigate on the interfaces and do meshings and CFD solves for a formula student purpose. If you want to help me contact me
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Hypermesh CFD Forces calculation in Engineering Quantities
Hello everyone. I am currently performing CFD simulations on a reentry capsule. I am having problems in understanding how the Engineering Quantities - Forces work. What are the units of the force? Does the slice plane I use affect on the force´s value? I am working in milimetres in the sketch and mesh ribbons, and I am…
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How to fix the No.of .Boundary layers in Conjugate heat transfer analysis?
Hi , I am currently performing a Conjugate Heat Transfer (CHT) analysis (steady-state) using SIMLAB and AcuSolve. The MRF (Multiple Reference Frame) RPM is approximately 20,000, and my CAD model includes a universal motor. Based on this, I estimated the heat source to be around 900 W. I used a CFD mesh for both the fluid…
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Is it Possible to add a media source in HyperStudy after the optimization is done?
Hello, I am using HyperStudy with HyperMesh CFD to conduct an optimization. I wanted to add a media source to produce visual results automatically, but the optimization is already over and it takes a long time to run. Can I add a media source as a response and can HyperStudy just generate the images without running…
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CFD-DEM-FEA three way coupling for water jet cutter
For water jet cutter, first stage is water pressing soil, second stage is cutter push soil, then cycle again.First stage requires EDEM-CFD coupling, while second step requires EDEM-FEA explicit dynamic coupling. as part of head, water jet spin with it. So CFD should change with FEA cutter head. Since there's no three way…
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Ayuda en CFD
alguien que me pueda ayudar o recomendar algún video o tutorial, necesito realizar una simulación CFD del flujo de aire dentro de la cabina de un vehículo, porporfavor
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Unable to Launch Simlab due non-executable hwx.exe
I installed the software of Simlab 2025 with additional files, but when i the software, this error is popped up, and the software is unable to launch.
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ERROR: error occurred executing acuPrep / ERROR :No RUN command found / Hypermesh CFD 2025
Hi, I have spent the past two consecutive days attempting to run a CFD simulation using HyperMesh. However, every time I attempt to run the simulation, it gets canceled and the following log file appears ( attached image). I have successfully run other simulations earlier this week without encountering any such issues. I…
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HypermeshCFDの起動について
hypermesh起動すると写真の画面出てきました。 ユーザーネームとパスワード打ち込んでも入れません。 どう対処すればよいでしょうか。 よろしくお願いします。
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Ideal Gas compression Analysis using acusolve
Hi Good Day! I ran an ideal gas compression analysis for our piston-cylinder model. I considered only the BDC-to-TDC mesh motion (upward stroke) and adjusted the time vs. displacement curve accordingly. Boundary conditions were applied properly. The simulation ran without errors and showed results, but the pressure peaked…
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How to perform the Aeroacoustics analysis for Air flow in Pipe?
Hi Good Day! I have an air blower model, and I want to perform an analysis to determine the sound levels at the inlet and outlet. Before working on the actual case, I’d like to start with a simpler scenario — air flowing through a pipe. Let’s consider a 1-meter pipe, where I know the mass flow rate at the outlet and assign…
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Hypermesh CFD Engineering Quantities varies with View Orientation
Hi everyone, I'm getting this weird thing where the lift/drag/side forces calculated by Engineering Quantities in CFD post-processing varies based on my view orientation. I'm highlighting all of the vehicle surfaces each time, yet still getting different results. Can someone what I might be doing wrong? Thanks!
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Cut Section Display Issue in HyperMesh CFD vs SimLab – Solids Appear as Hollow Surfaces
Hi Good Day! I’m currently working on a CFD model using HyperMesh CFD, and I've noticed a significant difference in how cut sections of solid bodies are displayed in the two software environments.(HM CFD & SIMLAB) In SimLab, when I take a cut section of solid geometry, the solids appear correctly as filled volumes, making…
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How to resolve the mesh motion distortion error in Acusolve?
Hi Good Day! I am performing the moving mesh using the ideal gas compression tutorial. After Updating the solution ,I encounter a mesh distortion error after some time steps . I’ve experimented with different element sizes, both coarse and fine, but the issue persists. Is there a recommended way to resolve this error?…
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What is hybrid message passing?
Good day to all, Someone could tell me please what is Hybrid message passing of the Hypermesh CFD solver and in what cases should I use it? Also if it could help to reduce computational running times. Thanks in advance.
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Ideal Gas Compression in an Actuating Piston
Hi Good day, I am currently working on a CFD analysis of a cylinder and piston assembly, using the AcuSolve Ideal Gas Compression in an Actuating Piston tutorial from SimLab as a reference. Following the tutorial, I have created the fluid domain and generated a table that defines the piston motion based on a mathematical…
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Make a Structured Mesh in Altair Hypermesh CFD
Description: Would love to create a strucutred mesh for later data exportation Product/Topic Name : Altair Hypermesh CFD 2024.1.0.30 Im doing a project where I use the Inlet and a plane far behind a model data to calculate the aeroydnamic forces and Drag/Lift coefficient based on Navier-Stokes equations integral form.…
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How to set a Cyinder and piston Movement in CFD Analysis simlab?
Hi Good day, I have a Piston and cylinder assembly with inlet and Outlet valves. Here I want to perform a CFD Analysis to find the pressure at inlet and outlet. I am able to extract the fluid volume within the piston and cylinder assembly when the piston is positioned at the Bottom Dead Center (BDC) of the cylinder. The…
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Errors in Fluid-Structure Interaction Analysis Using HyperMeshCFD (2024) and Optistruct (2024)
Hello everyone, I am working on a fluid-structure interaction analysis of pressure wave propagation using HyperMeshCFD and Optistruct. When I ran the calculation, The following error statement appeared in the computer console of the fem file. (also described in png file) " StdErr output from the solver: External Code via…
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CFD Pressure plot
Hello everyone, I'm doing a cfd computation in Altair Inspire, and I'm struggling to plot a pressure along the pipe axis plot. Apparently Inspire doesn't do plots other than convergence ones. What can I do? I also installed Paraview to post process the simulation files, but I can't find useful files other than a certain…
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TCL command in Hyperworks CFD 2022
Dear colleagues, I am trying to open a TCL command window within HYperWorks CFD GUI, but it seems that it is not available. Is there a way to open it? In addition, it seems that the open File>Run>TCL is not avaible either. Thank you in advance.
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HyperWorks CFD 2022 in batch mode
Dear colleagues, I am trying to run HyperWorks CFD using batch mode in order to automate an optimization process within HyperStudy. According to several forums, the best option to run this is using HMbacth and then -tcl to operate. I have tried creating a tcl script that opens and saves an .hm file (for checking purposes).…