[serene6390]

Hi, everyone, I'm a newbie in UDF, hope someone can help me with this:

I'm doing a heat transfer problem, the thermal boundary condition on the wall(x=H) is like this:
a*dT/dx-b*T+c=0

And actually a is constant, but b and c are related to pressure.

First I wanna ask, is that possible to define such a boundary condition in Fluent? In UDF, how to deal with the gradient of Temperature?
Second, how can I apply pressure in my function?

Thank you so much!