What is the best mesh is recommended in order to use for modelling cavitation conditions by using multiphase investigation in FLUENT (CFD)?
IMHO the type of mesh and the simulated physics are not very closely related to each other.
What matters with no regard to the mesh type, is that you obtain a mesh independent CFD solution in the limit of dx-->0. This applies to all possible mesh types and to all possible CFD physics.
Best regards,
Dr. Th. Frank.
From my personal experience of highly cavitating flows through fuel injection nozzles, you should use structured hexhedral mesh for stable simulations. Unstructured meshes will create lots of convergence problem. You have to take care of mesh skewness near sharp edges and in near wall regions. Creating proper mesh for such problem will take time but it is worth it if you want to avoid convergence issues.
Hexahedral mesh at center and use inflation near wall to get good result
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