Low determinant in OpenFOAM
Lately I seem to be having problems with the determinant of my cells. Right now I am working on a tetra-only mesh, which I then export for Fluent v6 and then convert into OpenFOAM format.
According to Ansys ICEM, the quality of my mesh is sufficient (At least 0.15 on the quality criterium), however when I do a checkMesh -allTopology -allGeometry I get a failed mesh check due to a high number of low determinant cells.
Returning to Ansys and checking for the determinant criterion, I get just 1 bar for max quality determinants, which obviously is not the case...
When checking for Quality:
Min = 0.190245, max = 0.999119, mean = 0.693216455497
673866 elements with the "Quality" diagnostic
When checking for Determinant:
Min = 1, max = 1, mean = 1.0
603610 elements with the "Determinant" diagnostic
70256 elements for which this diagnostic is undefined
Am I doing something wrong? Is this a bug? Or does it have to do with the conversion from Fluent mesh to OpenFOAM?
Advice is really appreciated, as I obviously cannot improve my meshes if I do not know what is wrong :)
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