Problem with geometry in shaper, how do I know whether solids are actually joined?

Hello, I’m a beginner to the salome platform and I’m having trouble making a model. Everything looks fine and meshes correctly, but I have issues when trying to import the .unv to openfoam. I think it probably has to do with the geometry and that I think the solids I partitioned and then joined might not be actually joned or something like that, but I’m not entirely sure. I did a lot of splits and the last operation is a compound.

By the way, the mesher creates some pyramids but I remove them using Mesh>Modification>Split volumes>filter by geometry type=pyramids, because .unv doesn’t seem to support that type of element.

I’ve attached the study file. I’ll appreciate any advice you could give me. Thank you!

StudyHelp.hdf (629.7 KB)