Add yaml with exo export

[danielwolff1]

In this PR, I implemented a method to export the mesh in exo format while dumping the .yaml input file.

When using the new method dump_with_exo_mesh(), cubitpy will automatically attach the XYZ GEOMETRY section to the yaml input file as well as omit the lengthy topology information, which will instead be inferred from the nodesets within 4C when reading in the exo mesh.

To fully enable this feature, I need to know which problems people at the institute are working with, in order to enable the output of the respective "GEOMETRY" section. Currently supported PROBLEMTYPEs are

• Fluid
• Structure

but more can be added if needed, by extending the problem_to_geometry_dict inside the add_problem_geometry_section() function.

[danielwolff1]

@m-frey this might be interesting for you since we talked about it yesterday :)

[isteinbrecher]

Thanks a lot for the contribution @danielwolff1, this is surely a very useful feature!

[danielwolff1]

Thanks for the swift review! I'm going to address all your points and then we can have a chat to clarify the remaining open points.

[isteinbrecher]

Thanks for the additional effort @danielwolff1, this looks good to me! If we want we can add the functionality for multi field input files (e.g., FSI) in a follow up PR.

[danielwolff1]

Thanks for the additional effort @danielwolff1, this looks good to me! If we want we can add the functionality for multi field input files (e.g., FSI) in a follow up PR.

I now adapted the implementation and implemented a small test case to support the export of multiple fields. However, in the unit test, I decided not to replicate the correct definition of the boundary conditions from the 3D FSI tutorial, as the additional statements for creating the BCs would just blow up the test method and not really add anything, since the creation of the geometry section is independent of the creation of the boundary sections of the input files. Moreover, the latter are already tested in other functions.

If you are fine with my proposal, this can be merged, otherwise I can also still adapt the test accordingly.

[isteinbrecher]

Thanks @danielwolff1 for these changes, very nice that we can now use the new 4C input features with directly reading exo files.

[danielwolff1]

Thanks for the great review process and for approving, I'm going to merge now! 🚀