Soft for fluid domain extraction
 

Hi all, I want to ask: what is Your favourite software for extraction of fluid domain for CFD mesher? I mean: assume that You have a CAD model of an arrangement: a complicated valve, pipes and so on...I want to know what soft You preferrably use for "filling" (in ansys there is a Fill tool in Modeler f.e.) the pipes, volumes and others to extract the fluid volume for meshing. Is your software able for cleaning a geometry?

Any advices would be appreciated.

Luk