[satty_00]

Greetings everyone,

I'm simulating high speed turbulent flow around an airfoil (cascade). I had started with low speeds (40 m/s) and got the results. But now I'm simulating transonic flows 90 m/s and I'm unable to converge the solution. The cascade has a nozzle section where the flow reaches very high velocities.

Settings and Conditions:

Density based Steady state solver.
Working fluid: Air (Compressible flow - Ideal gas)
Turbulence model: K-omega with SST.
Velocity Inlet at 90 m/s ( components at 48 degree )
Pressure outlet at 0 guage pressure
Periodic boundaries on either side of the airfoil (Created using mesh-interface)

Solver Settings:
Courant no: 3
URF for Turbulent viscosity and Disspation rate: 0.5
Other default settings.

Are there anything else to be considered while simulating high speed turbulent, compressible flows ?
I read threads on altering the Operating condtions. I haven't tried that.