Hey

I need assistance as I must validate the turbulence model I´m using for the flow around a car. As for now I made all the simulations with the SST, and I have made the comparison by making these again but with the K epsilon model.

I took notes of the aerodynamic coefficients Cd, Cl, and velocity profiles in several streamlines around the vehicle. I compare them against each other and see no big difference but I believe this is not enough for succesful SST validation; they must be compared to another model of known solution. I read in the archives about the ahmed model but I fail to understand the way you use it to validate your own car.

APART from experimental data comparisons, how do you validate the turb model?

Thanks!

Hi,

As you mention, there is plenty of good data in the literature on the Ahmed body. This body is specifically designed to be car-like, so if your model does the Ahmed body well it should do most car shapes well.

Regards, Glenn Horrocks