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Found 94 results

  1. Hi I am trying to perform a thermal analysis where a composite plate is subjected to radiation. The plate consists of 2 plies, the one on top is made of glass, the one on the bottom is made of aluminium. The radiation needs to go trough the glass and then reaches the aluminium plate. The aluminium absorbs almost all of the radiation, the glass mainly lets the radiation trough. How would I model this? I already did a test simulation which runs fine but it seems as if all the radiation is absorbed by the glass layer which of course is not what I want to achieve. Either the way I modelled the radiation is wrong or either my radiation coefficients are wrong, these are the ones I used: The radiation properties for glass: emissivity: 0.75 , specular transmissivity: 0.85 , diffuse transmissivity: 0 , specular reflectivity: 0.08 , diffuse reflectivity: 0 The radiation properties for aluminium: emissivity: 0.1 , specular transmissivity: 0 , diffuse transmissivity: 0 , specular reflectivity: 0.5 , diffuse reflectivity: 0.1 Any ideas or remarks?
  2. Hi, I am performing research for a thermal radiation CFD simulation. The simulation is the following: A plate is locally heated by a laserbeam. So my question is: would it be possible to only apply radiation on this single spot? How would I do this in AcuConsole? I have done a greenhouse simulation already with radiation heat but than the radiation hit the complete model. So is it possible to only locally apply radiation in a model? Thank you in advance Toon
  3. Hello every one. I need help. How to generate shear flow at velocity inlet & nodal initial condition at AcuSolve (as attach picture). For now, i only want to simulate shear flow in empty domain. After shear flow successfully generate, i want to put riser in the domain.
  4. Hi I am trying to simulate the temperature of a piece of paper lying on a surface, both subject to a radiation source (so a thermal CFD analyis). I made a large cube where the bottom side is the floor and the upper side is the outlet. The 4 vertical sides are inlets with a very low inflow speed (0.01 m/s). The piece of paper (modelled as a solid with the correct properties of paper) is lying on the floor obviously. Radiation heat is hitting the surface and the paper from dead above. When I try to run the model I get the following error: ''Non-planar inlet boundary condition found <Inlet quad4 Fluid wedge6>'' so I suppose something is up with how I am trying to simulate this problem (multple inlets,...). I ran the exact same problem with only one inlet and it ran fine. The paper and floor got hot but the asymmetry of the inflow kinda ''contaminated'' the result. Any ideas on how I can solve this? I am also wondering is there is a better way of solving this problem (so maybe I should use a different model setup)? I am not really interested in the flow field itself, more about the temperatures and flow field due to the temperatures (I included buoyancy due to Boussinesq). Any help and advice is appreciated! Thanks in advance Toon
  5. Hello everyone, I am learning to use HyperMesh and Acusolve and I am currently trying to create a CFD Tetramesh in HyperMesh and export it to AcuSolve. To get used to the software I've chosen to start with a Mesh for a very simple pipe-geometry. For creating the CFD Tetramesh I've followed all the steps in the following tutorial: https://altairhyperworks.com/hwhelp/Altair/2017/help/engsol/engsol.htm?cfd_1800.htm After creating the Mesh I've exported an inp. file for AcuSolve. The Problem is that once I import this file in AcuSolve no Volumes or Surfaces are shown. Maybe I'm missing something important or doing something wrong. I'd be grateful if someone can give me some tips. I've uploaded all the files that I've created so feel free to check them. Thanks in advance. Geo files.zip
  6. Hello everyone, I would like to ask is there any features in AcuSolve/AcuConsole/HyperMesh to calculate frontal area? For simple object (cylinder/box) i can calculate it manually, but not for complex object such as offshore jacket platform/ships/FPSO. p/s: If im not mistaken, in Ansys Fluent, the frontal area (reference area) can be calculate automatically by Fluent itself. Hopefully AcSolve have this feature as well.
  7. Hi there! I am trying to simulate a flow of humid air running through an helical pipe. As the air flows, it gets cooled from a negative heat flux on the walls of the pipe. Any thoughts on how can I approach this problem? Currently, I am not able to run the simulation because I get an error "Negative absolute pressure for humid air".
  8. Hi, I have a question regarding the Turbulence Intensity parameter that is located under the solver browser in Hypermesh 2019.1 (AcuSolve User Profile). What are the units of this parameter? Is it represented as a percentage or ratio? (I've attached a screen snippet) For example in AcuConsole GUI, the turbulence intensity parameter is input as a percentage (e.g 2.5 for 2.5% turbulence intensity). Best regards Brenton
  9. Hi All, I wanted to simulate conjugate heat transfer simulation in AcuSolve which involves Conduction & Mixed convection. I have followed the best practices that are described from meshing to problem setup. Herewith, im attaching my residual plot which seems not converged and stabilized results. It would be helpful if someone help me with this.
  10. Hi Experts, I'm looking forward to perform a full car exterior aerodynamic study. I've done with the tutorilas and implemented the same in my case too. But I'm getting some errors. The tutorial fuile I've been worked is a Plane with Wind tunnel (It does not have wheels. But When it comes to car, there was a need of integrating the wheel. So if there is relevant tutorial / model kindly share it with me. So that I can make the setup according to that file. I'm getting warnings as below when I followed the tutorial file "Plane" The tutorial I've been followed is "CFD-1400: Wind Tunnel Mesh" I'm also attaching the Acutail file for your reference. T3_EXT_Acusolve.bc_warningsT3_EXT_Acusolve.bc_warningsT3_EXT_Acusolve.bc_warnings T3_EXT_Acusolve_bc.warnings T3_EXT_Acusolve.1.Log_acuTail.txt
  11. Is it possible to do a 2D simulation of an aerofolio with Acusolver?
  12. Hi guys, i have some questions and problems with the tutorial OS-T 1600. 1. First question: What is the best way to start a FSI-Simulation. The way in the Tutorial, or the Co-Simulation Tool (Picture 1) (Picture 1) 2. Second question: When i start the FSI-Simulation i get an error (Picture 2). (Picture 2) I think i use the wrong hostname. Could anyone explain, what i should insert in the green field (Picture 3) (Picture 3) Thanks Michael
  13. Hello everyone. I would like to simulate a solid body interacting with a fluid body. As you can see in the model below, the solid body enters, through an interface, inside the fluid body. I assigned to the solid a vertical translation motion. Now, in the results, the two meshes interpenetrate, but the solid doesn't interact with the fluid. Can you help me please? picture1.bmp
  14. Hi, I was wondering whether it is possible to simulate the behaviour of granular material with acusolve, and if so, if anyone could give me a tip on how to do it thanks in advance!
  15. Dear AcuSolve Users, Please find the detailed procedure of mapping AcuSolve CFD results through linear interpolation option. It has a python script attached, a pdf document explaining the process to be followed. This Script can be utilized to get all the CFD results like Velocity, Pressure, temperature etc and map it onto other mesh for further analysis. Regards, Kamlesh Script.zip
  16. Dear AcuSolve Users, Please find the attached material to run AcuSolve in batch mode. Regards, Kamlesh BatchRun_AcuSolve.zip
  17. Hello, I have a query regarding the generation of core mesh in hypermesh cfd. Why it is necessary to have only tetra core meshing? Is it the requirement for hypermesh or in others also for cfd core must have tetras.
  18. Hello, I'm working on a model the third day and can't understand what is the mistake in the meshing parametres. Once I got to build and can't anymore, don't understand what the problem is. sector-100mkr-1gr-narost-001.acs
  19. Hi All, Please find attached tutorial for CFD optimisation of a manifold. Some of the applications, where it can be used includes, HVAC ducting • Reduce pressure drop • Increase flow uniformity • Maximize/minimize outlet temperature Heat exchangers • Maximize pressure drop • Maximize heat transfer Brake discs • Minimize temperature • Maximize heat transfer • Brake cooling ducts External Aero • Minimize drag • Maximize negative lift and many more. I have also attached a simple Pipe CFD optimisation tutorial. Please do contact us for any queries. Regards, kamlesh Acusolve_Hyperstudy_tutorial_manifold.zip Acusolve_Hyperstudy_Tutorial_Pipe.zip
  20. hello guys, i am doing some AcuSolve tutorials by Engineering Solutions-AcuSolve. I have found some problems with the Transient-heat-transfer while using on HyperMesh-Engineering Solutions. Here they are: 1. I can not restart computing on Engineering Solutions: The mentioned simulation is transient, which require a restart computing base on the previous computed results ( Steady-state). but restart function seemed not intergrated in Engineering solution. 2. Cant assign multiplier function for inlet's temperature: to be more precise, the inlet temperature drop down in few seconds. but this cant be specify in HyperMesh-Engineering solutions. Does anyone know about this issues? Please help. For more informations, please ask. Appreciated!
  21. Hi All, Please do register for Altair Multiphysics Webinar series. Click here to register Best Regards, Kamlesh
  22. Hi, Anyone have experience in using Hyperview as post process for Acusolve result? Currently, I'm able to plot contour (on surface) and streamlines. But, 1) How to make cut plane? 2) How to get average value of a surface contour plot? e.g. velocity magnitude at a surface Thanks
  23. If AcuFieldView is launched from AcuConsole, the default is to use the direct reader by selecting the desired problem.run.Log file. Once in AcuFieldView, a data file can be read using File > Data Input >AcuSolve [Direct Reader] > Browse to desired .Log file. Or if acuTrans or acuOut has been used to generate FieldView format data files: File > Data Input > AcuSolve [FV-UNS Export] > Browse to desired .fv file.
  24. AcuSolve Introduction Training webinar recording.
  25. Hello all, I am stuck up with the results visualization in acufield view.I have a log file but unable to extract plot in acufield view.It is showing error "internal software error". Please guide, how to resolve. Refer the attachment.
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