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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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Convergence issues with Acusolve and EDEM coupling
Hi all, Recently, I have been trying to use Acusolve-EDEM coupling to simulate a case of granular column collapse in water. Unfortunately, despite trying various approaches, the granular column always explodes (or bursts apart) in the water during the initial stages of the coupling. Could anyone please help me with this…
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AcuSolve
Description: CFD (Hypermesh) vs AcuSolve Product/Topic Name : CFD (Hypermesh) Are CFD (Hypermesh) and AcuSolve the same tools ?
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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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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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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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Coupled simulation Simlab - Edem
Hello, dear people from the Altair community, I am developing a coupled simulation between Simlab and Edem to simulate erosion in a sample (image below). I parametrized some parameters in the CAD through Inspire because at the end of the process I want to develop a hyperstudy model to easily vary some parameters in the…
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Cant see contours in my simulation?
I am simulating a flow through porous cylinder mimicking metal hydride LaNi5. After solving, I dont see my model displayed in the results section. There is proof of the simulation being completed as shown in the convergence plots. However, this is what appears on my screen after solving. When I hover over with the mouse,…
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Theory of particle volume fraction calculation in EDEM-Acusolve coupling
Hi all, I tried to figure out the computational details of particle volume fraction calculation in EDEM-Acusolve coupling, such as the theory and formulae, but I only found some brief introduction through the Altair Website. So can anyone tell me how to get the theory about particle volume fraction calculation used in EDEM…
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AcuSolve "Nodal Values" not written to .inp file (GUI bug?)
Hello, I'm encountering an issue with AcuConsole (version: [2023]) when defining a Nodal Boundary Condition using Type = Nodal Values. Here's what I did: Created a NodeID-ScalarValue table (e.g., FldTable7) with 32 nodes and their corresponding X velocity values. Assigned this table to a Nodal Boundary Condition (named…
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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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I am unable to set contact resistance in simlab acusolve.
I need to apply contact resistance between two bodies in acusolve. The faces selected are the shared faces between two bodies. The error above is shown during acusolve run. How to resolve this issue?
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acuPrep: *** ERROR: Invalid surface
Hi , I am performing Conjugate heat transfer analysis using Simlab & Acusolve with Moving reference Frame. I meshed the model using simlab and assigned the boundary condition properly. After submitting the run, I received this type of error: acuPrep: Processing SURFACE_SET( "Interface_WINDINGS_2_windings_1_tet_tria3" )…
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Flow Simulation over EV Battery Pack Using Axial Flow Fan
Description: [I am simulating the cooling of battery pack in a battery bucket using airflow coming from an axial fan which is attached to the battery bucket. I am using the Multiple Reference Frame(MRF) method where the axial fan is kept stationary and a cylinder which covers the fan is given a rotational velocity. The air…
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EDEM Failed reading file exported by Hypermesh CFD- Failed to read new data
Description: [Hi, I've been trying solving the Acusolve-EDEM tutorial "ACU-T: 6100 Particle Separation in a Windshifter using Altair EDEM" but when I try opening with EDEM the .dem file previously exported by Hypermesh CFD, I've got the following errors and I'm not able to open it: -Could not read file…
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FSI Simulation Fails with TCP socket write error from AcuSolve
Description: FSI Simulation Fails with TCP socket write error Product/Topic Name : Hello, I’m running an FSI simulation coupling OptiStruct and AcuSolve (set up via SimLab 2023, MKS units). Everything works fine when the mesh size is relatively coarse (e.g., 0.009 m or 0.006 m). However, when I refine the mesh to 0.003 m,…
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No Results / Solver Log Shown in SimLab 2024.1 (EDEM Coupling)
Hi all! My problem is as follows. I am trying to run the ACU-T:6102 Windshifter tutorial that couples EDEM with SimLab. I have AcuSolve, SimLab, and EDEM all version 2024.1. Whenever I follow the tutorial steps and right-click Results under Coupled Solution in EDEM to Update Results, instead of an orange result button,…
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How to extract water level height (volume fraction = 0.5) at left and right tank walls in each time
Description: I am using SimLab to perform a sloshing simulation of a water tank. The simulation uses the volume fraction (vf) to represent the water-air interface. I would like to extract the water level height at the left and right inner walls of the tank at each time step, where the water level is defined as the position…
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How to extract water level height (volume fraction = 0.5) at left and right tank walls in each time
Description: [Kindly add description here] Product/Topic Name : Altair SimLab 2023 + AcuSolve (Sloshing Simulation)
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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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Import STL geometry file to HyperWorks CFD
Hi. I wanted to import an STL geometry file (exported from EDEM) to HyperWorks CFD, and got an error message - unsupported file extension! I'm using Version 2022.3 for both EDEM and HyperWorks CFD. Some previous posts said that the student version doesn't support STL import. I don't think I have a student version. My…
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Acusolve 入門コース 02_ハーゲン・ポアズイユ流れ に関する質問
hyper works CFDで「Acusolve 入門コース 02_ハーゲン・ポアズイユ流れ」に取り組んでいます。 acusolve実行後、Run StatusダイアログにてPlot time history をクリックすると hyperworksが落ちます。 原因と対処方法を教えてください。 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…
