B.C.S on outflow outlet and pressure outlet

kenneth

Hi all,

In my code I always apply the outflow boundary condition (zero normal gradients for all variables) to the outlet subject to fully-developed flow condition. Another boundary flow condition for the outlet is pressure outlet. However, I have no idea about the second b.c. in theory and implementation in a CFD code. But my recent work need the use of the second one in my code. I would appreciate your hints.

Cheers,

Kenneth