How to simulate a fan?

Andy

Hello,

I am quiet new in CFX Simulations. Just used it a bit in my diploma thesis. Now I try to simulate the air-flow in a small box created by a fan. The geometrie of the fan, especially the rotorblades, are not important. It is displayed as a simple cylinder-volume. I know the characteristic line of this fan. With this data, it would be possible to use the CFX Data Point input to create a function and an expression. Right? But how do I use this expression? Do I create a boundary condition or a subdomain? How do I define inlet, outlet or opening?

Thanks fpr your answers.

Andreas