I am using a laminar flow module to simulate the flow inside a cylindrical chamber containing two crucibles. I am working on making the mesh more precise to avoid mesh-dependant results. The issue that I am facing is that in the 3D model, the minimum element quality of the mesh is 0.001. I realized the low-quality meshes are related to the thin faces that the crucibles are attaching to the large main cylinder (which the result of flow in connecting region is not relevant to my study). I tried to give thickness to the main tube, but it didn't work. It would be beneficial if you give me a hint on the meshing quality.
- For 2D, a maximum skewness less than 0.5 and an average of 0.1 are suitable. For 3D, a maximum of less than 0.9 and an average of 0.4 are suitable. The lower the maximum skewness, the better the mesh.
Element quality of the order of 1e-4 is bad for numerical simulations simulations. Work with boundary layers and custom parameters. Share your geometry file.
It is not too easy to give you a hint without your geometry. But if you use a laminar flow module it is not so crucial usage of bad meshes. You can create several meshes and compare results. If the results do not change with the changing of elements number it means that your result does not depend on meshes. You should achieve the absence of changes in results.
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