[Zigainer]

Hi,

I want to to a translational periodicity and use the material ideal gas.
My results using Air at 25° are converging and I can set a specific mass flow at the interface.
But I am not allowed to set a mass flow rate at an interface using air ideal gas. If I set it to none, my mass flow is asymptotically going to zero .... almost zero after 50 iteration ...... do I have to set a momentum source? Or whats the solution?

Thanks in advance!