heat-exchaner: the mesh could be coarser (currently, downloading additional files is needed)

[MakisH]

Although this is a more complicated scenario and it would be complicated to provide specifications, it would be good to have geometry files somewhere.

For historical reasons, we don't have access to the source geometry files anymore. Reconstructing the geometry or adapting the tutorial to a known geometry would be useful, so that if anyone wants to change one of the solvers, they can do it.

Note that the tutorial should not start from producing the meshes, but the user should be able to do this.

Todo:

• Add some geometry files (reconstruct or adapt the tutorial)
• Add short instructions on how to produce the meshes.

[IshaanDesai]

Is this still relevant?

[MakisH]

That's mostly a question of what we want the tutorials to be. If we accept that the tutorials are only to see how things are implemented preCICE-wise, then no, this is not relevant anymore. But we still don't have geometry files and we start from a given mesh.

@davidscn do you maybe know if there are any tools in OpenFOAM to update a given mesh?

[IshaanDesai]

Also see here as a relevant point in this discussion

[MakisH]

One additional argument here is that we currently share the complete meshes from LRZ Sync&Share, as they are several MB in size. If we added the mesh generation in the process (or if we managed to make the meshes coarser), we could host everything on GitHub and running would be much faster.

I would keep this issue open, as it affects the tutorials structure.

[MakisH]

Starting point for potentially coarsening an existing mesh: https://www.cfd-online.com/Forums/openfoam/98093-create-coarser-mesh-post-processing.html

We would then need something similar for CalculiX. Or, again, we remake the case from scratch (but that's a bigger package).

[davidscn]

@davidscn do you maybe know if there are any tools in OpenFOAM to update a given mesh?

I don't understand what exactly to update, but I guess I'm not aware of anything in this direction.

[MakisH]

I added a note on the tutorial description to ask for help, pointing to this issue.

[MakisH]

I think we can now fix this since we have the simplified heat exchanger tutorial: #301