[zese]

dear friends

I want to define convective or fully developed outlet boundary condition in CFX but I am not familiar how I can do that?

In fact, I am going to simulate swirling flow in a pipe whose outlet boundary condition must be either convective or fully developed.

thanks

[ghorrocks]

If you use a pressure outlet that will impose your defined pressure at the boundary and zero normal gradients on everything else. This is pretty good for modelling fully developed flow.