[jet_engine]

I was thinking about performing a simulation using 4 different turbulence models to compare them. These models would be Spalart-Allmaras DES or DDES and IDDES and the kw Shear Stress Transport model for a basic cylinder case with a Reynolds number of about 10^5.

What do you think that could work better and why?

[PositronCascade]

But the efficiency of turbulence models isn't related to what phenomena or what region you are interested in? For instance, the Spalart-Allmaras model was developed for aerodynamic flows and produces errors for some free shear flows, especially plane and round jet flows or SST k-ω is good in adverse pressure gradients and separating flow.

Maybe this topic can help you:
http://www.cfd-online.com/Forums/mai...ga-models.html

[jet_engine]

Originally Posted by PositronCascade

But the efficiency of turbulence models isn't related to what phenomena or what region you are interested in? For instance, the Spalart-Allmaras model was developed for aerodynamic flows and produces errors for some free shear flows, especially plane and round jet flows or SST k-ω is good in adverse pressure gradients and separating flow.

Maybe this topic can help you:
http://www.cfd-online.com/Forums/mai...ga-models.html

Thanks for your reply! I would like to focus on the separating flow and the behavior of this flow around the cylinder. Is there any specific physical reason or explanation why it is better handling separated flows?

I will definitely read the thread you linked as well, thanks!