[sarah l]

Hi,
I know my problem is so tacky and discussed a lot in this forum but let me raise again this problem by considering models and materials I employed.
I want to simulate flow through porous media. the fluid is Nitrogen. while I consider it incompressible flow , there is not any problem but by considering N2 compressible flow (ideal gas or real gas) , the convergence problem appears!

I use Fluent 14.5 and the convergence criteria were set at 10^-3.
Boundary condition for inlet, velocity-inlet and for outlet , pressure-outlet.T_in=773 and T_out=1173.

Thanks

P.S. I did every thing related to under relaxation factors and value limitations. Also I changed solver from pressure based to density based.