Keyur Kanade
Ansys Employee

With Mach 2.18, you can use pressure based solver. 

Use ideal law for density. 

Please try refined hex or tet with prisms mesh. 

Check mesh quality. Is it 2D or 3D?




If this helps, please mark this post as 'Is Solution' to help others.

Guidelines on the Student Community

How to access ANSYS help links