[kaeran]

Hello everyone,

I am facing a hard time in validating my 2D model.
Let me explain my problem first.

I am trying to differentiate between SST K-omega model and K-epsilon model through the heat transfer calculations in a cross flow over a cylinder.

Theoretically SST k-omega will behave better for heat transfer problems.
In my case it behaved the same way. Of course it will!!!

But the heat transfer predicitions after the seperation point seems to be not in correlation with the experimental results.

I am validating my model with respect to the experimental results done by Schmidt et al. (1943) for a Reynolds number of 1x10^5 (fully turbulent flow).

I have also attached a graph (Nusselt number vs. Angle.), in which you could see the strange behaviour after the seperation point (80°).

Y+ =< 1 is maintained.

Could anyone tell me, what could be wrong in my simulation or is this the behaviour of SST K-omega model after the separation point?? I have already spent a lot of time in this and I am quite confused.