Supersonic external aerodynamics

edi

Hi all,

I'm currently modeling 3d supersonic, compressible, inviscid external flow. The grid is quad. BCs: pressure far field and a simmetry plane. By now I was able to model successfully subsonic and nearly-sonic flows by means of coupled explicit solver. I tried even with the implicit but Fluent just hanged, probably due to the fact that my mesh is of millions of cells.

Now I want to increase the Mach number of the flow to 3 (fully supersonic), but the solver diverges. I played around with parameters following suggestions from tutorials or UGM documents without success. I even switched to segregated but with my great surprise the solver hangs just like in the coupled imp case...it does not even complete the first iteration.

Any hint?

Thank you in avdvance

Edi.