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vspaerocommonproblems [2017/06/09 13:11]
lpayne [VSPAERO Common Problems]
vspaerocommonproblems [2018/04/01 14:41] (current)
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 Another issue whose cause is still unknown to me is that for some geometries, certain numerical models work while others do not.  For example, a Vortex Lattice Method (VLM) may not work but the panel method will. I believe this could be due to the assumptions made by the VLM. This ties into another issue that I find when using the panel method, which is that VSPAERO runs and finish the solver, but then the results will not be accurate. When I have used the panel method and then tried plotting C<​sub>​Dtot</​sub>​ vs. C<​sub>​L</​sub>​ over a sweep of different AoA, they all end up equalling zero. \\ Another issue whose cause is still unknown to me is that for some geometries, certain numerical models work while others do not.  For example, a Vortex Lattice Method (VLM) may not work but the panel method will. I believe this could be due to the assumptions made by the VLM. This ties into another issue that I find when using the panel method, which is that VSPAERO runs and finish the solver, but then the results will not be accurate. When I have used the panel method and then tried plotting C<​sub>​Dtot</​sub>​ vs. C<​sub>​L</​sub>​ over a sweep of different AoA, they all end up equalling zero. \\
 ===== OpenVSP 3.12.0 ===== ===== OpenVSP 3.12.0 =====
-In the future, a new version of OpenVSP ​will be released with enhancements to VSPAERO specifically. ​This will allow for more control over VSPAERO including the use of control surfaces and no longer needing to create a setup file. In the pictures below are examples of how the GUI of the new case setup window has changed.+OpenVSP ​3.12.0 included many enhancements to VSPAERO specifically. ​It allows ​for more control over VSPAERO including the use of control surfaces and no longer needing to create a setup file. In the pictures below are examples of how the GUI of the new case setup window has changed.
 ===== Case Setup ===== ===== Case Setup =====
 One of the outstanding new features is the ability to preview the degenerate geometry plate in both VSPAERO and the geometry browser. When you have the "​Preview VLM Geometry"​ option selected, the model viewer will apply a view similar to the view I used above in the GIF to show the difference between degenerate geometries. \\ \\ One of the outstanding new features is the ability to preview the degenerate geometry plate in both VSPAERO and the geometry browser. When you have the "​Preview VLM Geometry"​ option selected, the model viewer will apply a view similar to the view I used above in the GIF to show the difference between degenerate geometries. \\ \\
 {{vspaero:​vspaerocommonproblems:​newcasesetup.png?​440x500 |OpenVSP 3.12.10 General Case Setup}} {{vspaero:​vspaerocommonproblems:​newcasesetup.png?​440x500 |OpenVSP 3.12.10 General Case Setup}}
 {{vspaero:​vspaerocommonproblems:​newcasesetupadv.png?​440x500 |OpenVSP 3.12.10 Advanced Case Setup}} \\ \\  {{vspaero:​vspaerocommonproblems:​newcasesetupadv.png?​440x500 |OpenVSP 3.12.10 Advanced Case Setup}} \\ \\ 
 +
  
 Another difference between the VSP 3.11.0 and 3.12.0 is that you now need to create degenerate geometries of the desired parts before going VSPAERO again as in previous versions. Make sure the correct Degen Geom file that matches your geometry and mass set is selected in the advanced tap of the case setup. As before, be aware that if sweeping through different flow conditions, the "Batch Calculation"​ option needs to be selected. An added new feature seen in the advanced case setup tap is the ability to set X-Z symmetry to allow for quicker solution times. One thing to note for the newer version is that if you are opening VSPAERO for the first time for your model, you still need to select the correct Degen Geom file even if it was automatically selected when you opened VSPAERO. If you do not do this, the "​Launch Solver"​ button will be grayed out, and you will not be able to launch the solver. \\ Another difference between the VSP 3.11.0 and 3.12.0 is that you now need to create degenerate geometries of the desired parts before going VSPAERO again as in previous versions. Make sure the correct Degen Geom file that matches your geometry and mass set is selected in the advanced tap of the case setup. As before, be aware that if sweeping through different flow conditions, the "Batch Calculation"​ option needs to be selected. An added new feature seen in the advanced case setup tap is the ability to set X-Z symmetry to allow for quicker solution times. One thing to note for the newer version is that if you are opening VSPAERO for the first time for your model, you still need to select the correct Degen Geom file even if it was automatically selected when you opened VSPAERO. If you do not do this, the "​Launch Solver"​ button will be grayed out, and you will not be able to launch the solver. \\
vspaerocommonproblems.1497039065.txt.gz ยท Last modified: 2018/04/01 14:40 (external edit)