Two parts sharing same mesh
 

I want to have two parts, INLET and COFLOW, in the same part of the mesh (a circular hole). Is this possible?

Thanks everyone.

Parts are mutually exclusive...

However, subsets can be overlapping.

Very few CFD solvers will support overlapping bocos, but FEA solvers do it all the time.

If your solver can support it, then perhaps all you need to do is take the mesh to the solver and apply the two bocos to the same part.

Unless you mean that you want to split your inlet into two distinct portions?

You can split the geometry before meshing an put half of the inlet into CoFlow, or you can select individual elements and put them into CoFlow... Just understand that when you put an element into CoFlow, it comes out of inlet because parts are mutually exclusive.