[rvl565]

Hi,

I am simulating flow in a centrifugal compressor with the casing using MRF.
In doing so, I have two regions a casing fluid region and an impeller fluid region ( non conformal mesh ).

Now when i create an interface between them i notice that fluent creates extra interior and wall regions.

What are these extra wall and interior regions, should i be worried about them?
I am not being able to convert these extra walls into interiors ( the option doesnt exist, i can convert it into symmetry, velocity inlet,fan ,etc but not interior )

In the tutorials, it is mentioned that a shadow wall will be created in such a case, this does not happen in my case.

Thanks