And although OF is unstructured by design, it can access many favourable aspects of structured meshes through the resulting shape of the system matrix. However, if you use hex/quad meshes you will probably run into fewer problems than with tets. I think HPE laid it all out pretty clearly: Exhaust checkMesh, if need be. If you have a 2D or one-cell thick mesh, you can extrude the spanwise direction by simply using `extrudeMesh` utility in OF, and make spanwise boundaries as symmetry. So 2D flow computations are achieved by making spanwise boundaries as cyclic, hence infinite span. There is no 2D mesh capability in OpenFOAM (apart from finiteArea modules). For OpenFOAM, the cell centre access is carried out by an indirect-addressing system, which is unstructured.
Unlike the wrong usage, structured mesh means index-access of cell centres (not the hexahedral shape of cells).
OpenFOAM always uses unstructured mesh. (particularly this one, if you want to use good quality grids) There are plenty of NACA0012 meshes available for your expense to be used in OF, for example: OF will not operate with tetra-based meshes as good as it does with hexa-based meshes. PhD supervision's role is limited to `facilitate` your work, they cannot tell you what to do. If you are a PhD candidate, don't give a f.ck with your supervisor. geo file, some screenshots of the mesh and of the checkmesh errors.
GMSH OFFSET HOW TO
I've been struggling for weeks now trying to understand how to fix this problem and I'm running out of time for my thesis project. And I'm not able to proceed with any analysis. When I finally exported the mesh and converted it to Openfoam, I ran into different checkmesh errors such as negative volumes, non orthogonal faces, ecc. At the end I obtained a kind of boundary layer with structured mesh and the rest of domain was unstructured. The only solution I found was to do a sort of offset of the profile, extrude it and then define the different surfaces and volumes. The problem is that I need to create a 3D boundary layer around the finite wing and obviously it's not possible because gmsh currently allows to create only a 2D boundary layer field. I'm using Gmsh for meshing and OpenFoam for the CFD analysis. I'm trying to create a 3D mesh of a finite wing NACA0012 for the purpose to study the tip vortices. Hello everybody!! I apologize in advance for my bad english, it's not my mothertongue. Gmsh errors on openfoam checkmesh - CFD Online Discussion Forums
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