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#1 |
New Member
Edward Reed
Join Date: Mar 2009
Posts: 12
Rep Power: 17 ![]() |
I'm just getting start with OpenFOAM and am looking to use it for external aero applications. To get started, I followed the pitzDaily tutorial in the Programmer's Guide for the rearward facing step with simpleFoam. When I try to extend this problem to 3D with a tetrahedral mesh around a simple aircraft, the solution is not coherent. I've turned off turbulence in an effort to simplify things with no luck.
Do I need to change interpolation schemes to get reasonable results using a tetrahedral mesh? What am I missing? |
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#2 |
Member
Patrick Bourdin
Join Date: Mar 2009
Posts: 40
Rep Power: 17 ![]() |
What do you mean exactly by "not coherent"?
Do you have a prismatic layer (normal extrusion of your surface mesh at the wall) between your aircraft and your tet mesh? If not, you will not be able to properly resolve the boundary layer. As regards interpolation schemes, go for higher order schemes like Gamma or linearUpwind. It may be also worth checking your mesh with checkMesh (if the mesh is compromised, so is your numerical solution). |
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#3 |
New Member
Edward Reed
Join Date: Mar 2009
Posts: 12
Rep Power: 17 ![]() |
I was not setting an initial velocity for the field, just a boundary condition. Once I set an initial field, either constant or initialized from potentialFoam, I was able to get reasonable results.
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Thread | Thread Starter | Forum | Replies | Last Post |
IcoDyMFoam and tetrahedral meshes | ulrich_lange | OpenFOAM Running, Solving & CFD | 11 | April 16, 2007 17:44 |
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[Technical] Tetrahedral meshes | Damian Merrick (Merrick) | OpenFOAM Meshing & Mesh Conversion | 1 | December 14, 2004 21:29 |
Can tetrahedral meshes converge for transient | Jen | Main CFD Forum | 5 | June 13, 2003 18:49 |
Large 3D tetrahedral meshes | Aldo Bonfiglioli | Main CFD Forum | 4 | August 27, 1999 04:33 |