meshing (or not) complex solids?

[sempredritto]

We are experimenting with a "meshfree" solver that does not require meshing, and looking for solid models that are particularly difficult to mesh, e.g. those with small features, complex geometry, etc. Ideally,would like them to be Parasolid models (such as those used in Solidworks), but other solids would be also of interest.

Thank you.