[airstar]

Hello, I have some unknown zones appearing in my boundary conditions, appearing as wall. Nothing is highlighted when I press on them. However, when enter the Mesh Interface, these walls appear as the boundary zones.

May I ask where these walls are from? And how do I clean up my zones so that they would not appear?

I have attached screenshots of them. thank you!

I'm doing a sliding mesh method therefore would need to insert a non-conformal interface in my sliding zones. I cannot proceed without knowing what the unknown walls are as they are included in the interfaces?! Capture 1.PNG

Capture.PNG