Dear all, how to define the external airflow boundary conditions, expecially for the outlet? since there is more than one free face? I set the velocity inlet as the inlet boundary condition. outflow as the outlet b.c.? How about the other free face? Could I give them pressure outlet? Could I mix use the pressure outlet and outflow in one case?

Thanks in advance

Use the far-field bc on all your external bc. Luca

sorry, I did not mention that it is incompressible flow. therefore, the far field could not be used

Ah, oK. So you can use velocity inlet and pressure outlet.Let me know if I'm clear.Luca