[hsieh]

Dear OpenFOAMers:

I am trying to model a heat transfer problem where inside the fluid domain (air), there is a fan with specified speed.

The internal fan has an inlet side (into the fan) and an outlet side (back into the fluid domain). Both the inlet side and the outlet side will have velocity specified. How should pressure and temperature BCs at the inlet and outlet be applied?

For temperature, I was thinking
at inlet: zeroGradient
at outlet: compute average temperature at the inlet, and, assign this to the outlet

Is this reasonable? How about pressure? zeroGradient for both?

By the way, this is a transient problem.

Can someone shed some light on this? Thanks!

Pei