temperature jump
 

Hi,

I want calculate a temperature distribution in a gaz restricted by a solid
(especially in the gaz-surface boundary or exactely Knudsen layer)

for calculate the temperature of gar near the surface (temperature jump), we must used the surface temperature Tw in the condition (0.01<Kn<0.1).
so here, I have this method:

create new field function, that define the relation between Tg (temperature Jump) and Tw in the condition (0.01<Kn<0.1), but in this relation, I have the derivative of the temperature Tw (dT/dy) and I dont find this derivative in StarCCM+.

So how can I solve this problem?
and if has any suggestion for an other method to calculate this temperature.

thanks in advance.

Sabrina