You can generate separate mesh files for the flow region and for each moving part. A geometric technique will be used to apply appropriate boundary conditions when overlapping of the fluid region by the rigid part occurs. Element conformity and node matching is not required.

After generating these mesh files, use Ansys Polyfuse to combine them into a single new mesh representing the geometry of the problem you want to solve. Specify a different subdomain for each distinct part, moving or stationary. See Combining Meshes with Ansys Polyfuse for information about using Ansys Polyfuse to combine meshes.