implement of Spalart-Allmaras model
 

I have implemented the S-A model in the code. In the case of boundary layer flow, the results of validation is good and same with other simulation results.

However, in the existence of edge (ex. backstep , cavity) in geomerty, the convergence of results is not good and so slow or blow up.

In my thought, the positiveness of production term is not satisfied.

Perhaps, do you konw the skills or tricks to improve the convergence of S-A model. Or some methods to stabilize the code ??

Thank you in advance.

hi dear...
i am strongly in need with a spalart allmaras code..
can i have your code ????
thanks