I can only answer part a. of your question. I recommend you post questions b. and c. in the Fluids category and not the Structures category.nThe best file format to use to prepare geometry for meshing is Parasolid.nDesignModeler requires you to export to Parasolid first, then use File, Import External Geometry File.nSpaceClaim can open SolidWorks directly, so you don't need to export from SolidWorks, and it can also open Parasolid. In either case, use File, Open and set the file type.n