[senthur]

hi,
im having trouble to rectify non-manifold edges in my geometry. my problem is solving a pipe flow with heat transfer for the simple pipe having thickness of something. i want inner surface and outer surface of the pipe in order to attain solid region. for inlet and outlet. i created new surface. diagnosing will result in non manifold edges. i want all those things in geometry. what i need to do.how to rectify this.