[uygar]

Hi everyone,

I am currently working on a chtMultiRegionFoam case, but I have been encountering errors. To diagnose the issue, I tested my case with a different mesh, and it did not crash. This leads me to believe that the problem is related to the mesh itself.

When I run the command:checkMesh -allTopology -allGeometry

I receive the following output:

Overall domain bounding box (-0.88666778 -0.965 -7.4610644) (11.448332 5.035 5.2989356)
Mesh has 3 geometric (non-empty/wedge) directions (1 1 1)
Mesh has 3 solution (non-empty) directions (1 1 1)
Boundary openness (3.1762438e-16 -3.4303587e-16 -6.7638209e-17) OK.
Max cell openness = 6.025876e-16 OK.
Max aspect ratio = 287.23208 OK.
Minimum face area = 6.7813085e-06. Maximum face area = 0.20621677. Face area magnitudes OK.
Min volume = 1.3850342e-07. Max volume = 0.026258727. Total volume = 944.25165. Cell volumes OK.
Mesh non-orthogonality Max: 89.536209 average: 21.898376
*Number of severely non-orthogonal (> 70 degrees) faces: 395.
Non-orthogonality check OK.
<<Writing 395 non-orthogonal faces to set nonOrthoFaces
Face pyramids OK.
Max skewness = 1.4605003 OK.
Coupled point location match (average 0) OK.
Face tets OK.
Min/max edge length = 0.00028999706 0.87553332 OK.
All angles in faces OK.
All face flatness OK.
Cell determinant (wellposedness) : minimum: 0 average: 0.17231136
***Cells with small determinant (< 0.001) found, number of cells: 737
<<Writing 737 under-determined cells to set underdeterminedCells
Concave cell check OK.
Face interpolation weight : minimum: 0.0027391914 average: 0.44086279
***Faces with small interpolation weight (< 0.05) found, number of faces: 269
<<Writing 269 faces with low interpolation weights to set lowWeightFaces
Face volume ratio : minimum: 0.0027467152 average: 0.80695987
***Faces with small volume ratio (< 0.01) found, number of faces: 174
<<Writing 174 faces with low volume ratio cells to set lowVolRatioFaces

Failed 3 mesh checks.

End

I created both meshes using Salome, but the larger mesh seems to be causing the issue. My question is:

Should I adjust any settings in Salome other than just changing the mesh size?

Is it possible to fix these issues using OpenFOAM utilities instead of modifying the mesh in Salome?

Thank you for your help in advance! 😊