RSM Low-Re Stress Omega
 

I'm simulating a problem involing film cooling and want to use the RSM Low-Re Stress Omega model, I can obtain a solution but only when using the First Order Upwind discretization for Turbulent Kenetic Energy. If I use Second Order Upwind or Third-Order MUSCL I get turbulent viscosity errors and the solution eventually diverges.

Has anyone else had this problem and knows of a solution?

N.B I'm using the density based solver