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[gmshToFoam] [checkMesh] Error high aspect ratio, ngetaive face area and cell volume |
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March 26, 2021, 12:11 |
[gmshToFoam] [checkMesh] Error high aspect ratio, ngetaive face area and cell volume
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#1 |
New Member
bintangwicaksono
Join Date: Mar 2021
Posts: 1
Rep Power: 0 |
Hello forum !
First of all I am new to Openfoam. I have a mesh using GMSH, extrude (to get 3D domain) and gmshToFoam. At first, its all looks nice until i do « checkMesh » and all of enjoyment dissapear. I have this following error Code:
***High aspect ratio cells found, Max aspect ratio: 3.35195e+155, number of cells 67 <<Writing 67 cells with high aspect ratio to set highAspectRatioCells ***Zero or negative face area detected. Minimum area: 0 <<Writing 137 zero area faces to set zeroAreaFaces ***Zero or negative cell volume detected. Minimum negative volume: 0, Number of negative volume cells: 67 <<Writing 67 zero volume cells to set zeroVolumeCells Mesh non-orthogonality Max: 90 average: 34.0927 ***Number of non-orthogonality errors: 37. <<Writing 37 non-orthogonal faces to set nonOrthoFaces Face pyramids OK. ***Max skewness = 1.78771e+154, 135 highly skew faces detected which may impair the quality of the results <<Writing 135 skew faces to set skewFaces Coupled point location match (average 0) OK. Failed 5 mesh checks. End |
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July 10, 2023, 21:56 |
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#2 |
New Member
Nick Howlett
Join Date: Oct 2021
Location: Melbourne
Posts: 11
Rep Power: 5 |
I've recently had a similar issue and found that GMSH's Transfinite meshing with grading (for boundary layers, for example) caused such non-realistic results in checkMesh (by removing the grading checkMesh was happy).
If needing grading, perhaps use GMSH's boundaryLayer (Field) method. Details on the code needed: How to create a 2D boundary layer in gmsh? |
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Tags |
checkmesh error, checkmesh issue, gmshtofoam, high aspect ratio, negative cell volume |
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