Compression Corner Shock Wave Turbulent Boundary Layer Interaction
 

We have been trying to simulate the https://www.aem.umn.edu/people/facul...rishpaper2.pdf paper. We are using Fluent 14.5 (2d, dp, dbns imp, sstkw) to simulate the compression ramp. Boundary conditions- Inlet and upper boundary(pressure farfield),wall(no slip, constant temperature), exit(pressure outlet) with turbulence parameters from the paper(w_inf=10*u_inf/L,k_inf=.01*nu_inf*w_inf).

But the problem is that the separation starts 2.688 cm before the corner in the paper while we found it starting 14 cm before the corner. The separation bubble length is also correspondingly much bigger.
We have attempted to solve it by trying a few things but the separation start and bubble length is always much bigger. We are stuck here and desperate to find a solution. Could anyone please help?