Compressible flow model
 

Hi,
I would like to simulate the duct(internal flow) with inlet mach number 2. What type of boundary conditions at inlet i need to give?
It is givng the warning that velocity boundary conditions should not give at inlet for compressible flow. Please give a solutions for this problem.

Thanks
Reddy.

Compressible Flow
 

Not sure what code you are using but you likely need to apply a mass flow rate, something that will remain constant throughout the model, velocity is too vague for compressible flows.
I would have thought you would need some sort of temperature too?