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Mesh refinement cause some instability

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Old   July 10, 2023, 13:36
Default Mesh refinement cause some instability
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Farzad Faraji
Join Date: Nov 2019
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Hello all
I am doing the same simulation with and without mesh refinement(both mesh are created using snappyHexMesh) which I have attached in the attachment section. My question is that why mesh refinement show some instability in velocity?

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File Type: jpeg RefinedMeshwithinstability.jpeg (126.3 KB, 16 views)
File Type: jpeg NormalMeshwithNoinstability.jpeg (177.0 KB, 14 views)
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dpmfoam, instability, mesh, snappyhexmesh

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