[dennis722]

I am simulating a fsae car. First I have simulated it with the realizable K-Epsilon Two-Layer with exact wall distance and two-layer all y+ wall treatment. Second i have simulated the car with the K-Omega SST Turbulence with exact wall distance and all y+ wall treatment.

My y+ goes from 1 to about 20 and i took the exact same mesh for both simulations.

With the k-epsilon i got the following values: Cl=-0.575 (Fl=-191.65N) and Cd=0.372 (Fd=124.05N)

And with k-omega i got: Cl=-0.524 (Fl=-174.49N) and Cd=0.358 (Fd=119.35N)

To that i have to say the the convergence of the k-epsilon was better it converged after about 1000 iterations and the k-omega doesn't really converged after 4200 iterations.

I have read, about different models and every it says that the k-omega is better for seperated flows and so better for getting the right lift and drag values.

I don't know which model should know be right or better..

Thank you