[quarkz]

Hi,

I'm now running some hypersonic problems, such as double cone, concave ramp etc. In the interpolationSchemes, I used:

reconstruct(rho) upwind;
reconstruct(U) upwind;
reconstruct(T) upwind;

I tried all others but they caused the solution to diverge rather quickly. I even tried changing the scheme after running the upwind solution for a while, but the solution still diverges.

1st of all, am I restricted to using upwind scheme because it is upwind?
Secondly, is using the upwind scheme acceptable for accuracy?

Lastly, is there any other option I can do if my current accuracy is not acceptable?

Thanks.