external compressible flow
 

I study a classic case about ramp shock wave,but it diverged after 300 iterations. please help me! my fluent setting as following: Implict couple solver steady operation pressure: 101325pa k-o turbulent model only one inlet(outlet):far-pressure-field£»mach number:5.7£»I=0.01£»length:0.0015m£»gauge pressure=0 computing field: half circle; r=30m courant number:1 second upwind

Re: external compressible flow
 

It is OK

Re: external compressible flow
 

Try changing far field to pressure outlet

Re: external compressible flow
 

thanks for your help! but there is only flow boundary: far-field in my setting ,according to your advice, I must split it to two boundaries and the one is pressure-oulet,another is ???? I have send my dicrpition of the mesh to your e-mail, please point out your suggestion. thanks!