CFD Online Discussion Forums - [Other] OpenFOAM - structured or unstructured Grids ?

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Quote:

Originally Posted by alberto (Post 257044)

As Mark said, OF can deal with polyhedral grids. You're probably referring to some discussion where using tetrahedral grids problems appeared.
OpenFOAM is, in my experience, quite sensitive to the mesh quality, so you need to be a bit careful when generating the grid to avoid very skewed cells. Many of the users I saw reporting problems were using salomé or gmsh to generate their grid. They're good tools, but, in my experience, their meshing capabilities are not always the best for finite-volume codes.

Yes, many. Just take a look at the slides of workshops and conferences about OpenFOAM.

Best,

hello Alberto,
please can you suggest me which meshing tool is best suited for OpenFoam ?

thank you

unstructured grid with chemistry solver?

Has anyone tried using 3D tet unstructured grids with an OpenFOAM chemistry density-based solver? Nice tet grids are pretty easy to make with Salome... I have done some FV hypersonic combustion with other solvers after Salome meshing, but it's a bit tricky. Commercial meshers usually make more numerically robust meshes.

Thank You Very Much,
PattiM

Quote:

Originally Posted by Bharath Bhushan (Post 640539)

hello Alberto,
please can you suggest me which meshing tool is best suited for OpenFoam ?

thank you

My tool of choice is Gmsh for relatively simple geometries. My favorite part about it is that you are not required to use a GUI; you can script the geometry and mesh entirely, allowing for quick changes and batch runs of parameter variations (e.g. angle of attack, sizing, etc.).