|September 27, 2010, 13:04||
Cell determinant (wellposedness)
Join Date: Jun 2009
Location: Murcia, Spain
Posts: 14Rep Power: 8
I'm pretty sure there isn't a single thread in the forum dealing with this thema and I hope that somebody can shed some light on this.
checkMesh says my mesh is OK, but if I run "checkMesh -allGeometry -allTopology" I get a huge number of cells with small determinant that are written to a faceSet undeterminedCells.
I guess I need to change my numerical schemes, but in order to do that I need to understand how this small determinant values affect my simulations.
Can anybody please comment on that?
PS.- I know I could re-build the mesh and get rid of the low determinants, but this is not the point. I would like to understand their effect on the numerics.
|August 30, 2011, 08:40||
Join Date: Nov 2009
Posts: 96Rep Power: 8
I'm also interested in this.
Has anyone some experience with this issue? Does this even effect the simulation?
"When I meet God, I am going to ask him two questions: Why relativity? And why turbulence? I really believe he will have an answer for the first." Werner Heisenberg
|April 17, 2012, 12:26||
Join Date: Mar 2009
Location: West London
Posts: 44Rep Power: 8
I'm interested too and can't find anywhere on this site that helps!
I realised the cells in question were extruded triangles; the extrusion resulted in all nodes of the wedges being in contact with a boundary condition: symmetry on one side, no slip on the other two: all nodes in each wedge are on a defined boundary. Perhaps that's the issue. They don't seem to be affecting solution too much.
|determinant, mesh, pressure, quality, scheme|
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