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thavemann11

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  1. Hello, When attempting to run a CFD simulation in Hyperworks Virtual Wind Tunnel 2019.2, the run almost immediately fails with the following dialog message: Timer stopped because of "JOB_UNKNOWN_STAGE". When looking at the file directory for the run, the only file generated is the AnalysisHistory.info file, which reads: # -------------- Virtual Wind Tunnel Analysis History Information ------------ # This file contains the history information of virtual wind tunnel analysis # NOTE: DO NOT DELETE THIS FILE IF HISTORY TO BE LOADED IN FUTURE Client = Inspire 2019 19.2 11125 Name = Full_Vehicle_CFD_Model_v11_run5 WorkingDir = /home/thavema/Documents/HW/2019/vwt/Full_Vehicle_CFD_Model_v11_run5_9-8-2020_18-36-22 ModelName = Full_Vehicle_CFD_Model_v11 GroupId = 1 StartTime = 9/8/2020 18:36:29 CompletionTime = 9/8/2020 18:36:35 ElapsedTime = 00:00:02 Status = 6 PercentComplete = 100.000000 #END RUN HISTORY --------------- I was thinking that this might be an issue of not enough computing power because it is a large model. Has anyone run into this issue before? Thank you so much for your help!
  2. Okay I'll try that, thanks for your help!
  3. Hello everyone, I have run an aerodynamic CFD simulation on a racecar using Virtual Wind Tunnel. I would like to be able to open the results in AcuConsole to perform a subsequent heat transfer analysis of a box inside the cockpit of the vehicle. When opening the file in AcuConsole, the volumes, surfaces, and boundary conditions are preset because of the simulation conducted in Virtual Wind Tunnel. The box in the cockpit, which I would like to model as a heat generating volume has been preset as a surface in AcuConsole. Does anyone know of any way to model this box as an object that generates heat? Thanks for your help
  4. Thank you both for your help, I will look into AcuConsole for mapping the CFD result from VWT or creating a simulation for both flow and heat transfer simultaneously.
  5. Hello everyone, Would it be possible to use results from a Virtual Wind Tunnel simulation to form boundary conditions (i.e. inlet velocities) for a heat transfer CFD simulation? Thanks for your help!
  6. The results are definitely better than before, but still not reasonable. Could there be an issue of where the global coordinate system is placed? Should the global coordinate system be at the very front tip of the body?
  7. acupro, I created the CoP_x function in AcuFieldView and created a boundary surface contour plot with respect to the vector function of velocity. When doing this, the legend shows that the values range from positive to negative values in the order of 100 millions, rather than just one single value for center of pressure in the x-direction. Should I be plotting with respect to a different function than velocity? Thanks, Tommy
  8. Hello everyone, Is there a way to calculate the center of pressure in AcuFieldView for an aerodynamic analysis that was performed in Virtual Wind Tunnel? Thanks for your help, Tommy
  9. Hello everyone, I am attempting to compare two different CFD simulation results to understand the change in resultant downforce at each wheel of a vehicle after adding components to the baseline vehicle. To do this, I have been trying to implement a custom function in AcuFieldView which would look something like this: 2:z-surface_traction-1:z-surface_traction. The two datasets have different grids however, so it is necessary to perform data sampling to make both datasets have the same grid. When the selected dataset is sampled, there is no option to read extended variables (z-surface_traction is an extended variable). Is there any way to include the extended variables when sampling datasets, or is there another way of being able to do this? Thanks for your help, Tommy
  10. Hello everyone, Is it possible to run two or more cars in Virtual Wind Tunnel and extract separate aerodynamic parameters from both vehicles? I am attempting to understand the effects of a following car-leading car dynamic. Thanks for your help, Tommy
  11. Hello everyone, I am attempting to mesh a full vehicle model of an open-wheel racecar in Hypermesh, for export to Virtual Wind Tunnel. So far, I have been successful in meshing the model without the suspension components and wheels. However, when the suspension and wheels are attached, it seems like there are way too many intersections/penetrations and free edges to fix. Does anyone have any tips on how to cleanup the geometry to get rid of most of the intersection and free edges issues? Thanks for your help, Tommy
  12. Hello everyone, I am attempting to mesh a full vehicle model of an open-wheel racecar in Hypermesh, for export to Virtual Wind Tunnel. So far, I have been successful in meshing the model without the suspension components and wheels. However, when the suspension and wheels are attached, it seems like there are way too many intersections/penetrations and free edges to fix. Does anyone have any tips on how to cleanup the geometry to get rid of most of the intersection and free edges issues? Thanks for your help, Tommy
  13. The element check of <2 degrees worked! Thank you so much for your help! Right now the model I am working with is a vehicle without its suspension and wheels. When I attempt to mesh with the suspension and wheels included, there is a tremendous amount of free edges, T-connections, and intersections/penetrations. Do you have any tips on how to mitigate these issues?
  14. Hello everyone, I am having an issue with mesh intersections when running a full vehicle model inside Virtual Wind Tunnel. I have read up on all of the previous forums on this topic about how there cannot be any mesh intersections/penetrations, free edges/T-connections, or connectivity or duplicate element issues. In Hypermesh, I thought that I had resolved all of these issues because Hypermesh told me that there were not any of those issues in my model. However, after attempting to run the model in VWT, the meshintersection.nas file still popped up in my run directory. When importing this meshintersection.nas file into Hypermesh with the vehicle model, it appears that there are is a very small surface underneath the body of the vehicle that is attempting to be meshed. I have tried multiple geometry clean-up techniques and removed all intersections and free edges, however, these small elements beneath the vehicle still pop up. Is there some kind of geometry cleanup tool that can be used to stop these elements from forming underneath the vehicle? Thanks for your help!
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