I have a question regarding the different mapping options:
I actually work at the Mok-FSI benchmark with standard preCICE adapters for OpenFOAM and CalculiX. The benchmark is similar to the flap-case tutorial and I received good agreement and a smooth mapping with rbf-thin-plate-splines-mapping. If I switch to nearest projection I receive overlapping meshes at the FSI interface. I see this kind of problem quite often in nearest projection mapping and I wonder if there is something wrong in my set-up, mesh density or parameters (e.g. the FSI coupling).
Many thanks in advance for any advice.
P.S: I’ve been digging deeper and noticed I noticed that apparently not all my nodes on the structure are used for the mesh move. I found 420 entries in the VTK export, while I have about 600 nodes on the FSI interface in the solid. My cell density between flow and structure is approximately the same, which leads to twice as much node density in the solid (due to the intermediate nodes). Is this a problem for the mapping? I can’t completely exclude that there is a problem in the grid export or an inconsistency what preCICE expects as input.