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parallel finite element unstructured meshes
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Kj/gmsh4 #374

Closed KennethEJansen closed 2 years ago

KennethEJansen commented 2 years ago

gmshV4

Brief Description: Changes to enable v4 gmsh file read and create a dmg. In current form it breaks the existing v2 gmsh read capability which probably needs to become a separate app since v2 does not have the model info to create a dmg.

Changes were off of develop. Addresses Issue #371.

Test AirfoilDemo.msh file was added meshes. mpirun -np 1 from_gmsh none AirfoilDemo.msh AirfoilDemoMDS/ airfoil.dmg will make airfoil.dmg file and AirfoilDemoMDS (mds mesh directory) that are good to go with chef (assuming you make .spj file with your BC and IC attributes).

Note: gmsh native geometry kernel will make construction vertices for the center of circles that are difficult to (I could not) delete but, if you use the OpenCascade Factory to make your .geo file they can be deleted (see geo file for how to delete them). To be clear they MUST be deleted or they will show up in your dmg file without any adjacency and from_gmsh will fail to pass verify. Alternatively, in gmsh master@96cb58db (and newer), the .geo file setting Mesh.SaveWithoutOrphans=1 will disable writing these construction model entities to the gmsh file.

cwsmith commented 2 years ago

@KennethEJansen v2 support has been restored. Did you want to sanity check that I didn't break v4 (beyond verify passing in the ctest running on the AirfoilDemo mesh) or should I go ahead and merge?