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-   -   Cell determinant (wellposedness) (http://www.cfd-online.com/Forums/openfoam/80474-cell-determinant-wellposedness.html)

Zowie September 27, 2010 13:04

Cell determinant (wellposedness)
 
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?

Thanks!

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.

Andrea_85 April 5, 2011 04:23

I have the same problem. Did you find any solution?

andrea

val46 August 30, 2011 08:40

I'm also interested in this.
Has anyone some experience with this issue? Does this even effect the simulation?

anothr_acc April 17, 2012 12:26

I'm interested too and can't find anywhere on this site that helps!

and then......

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.


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