Bad Cd results applying kε models to hydrofoil
Hi guys,
I simulated a 2D hydrofoil geometry in noncavitating conditions. The tested angles are from 0 to 10 degrees and the velocity is constant. I simulated this hydrofoil using SpalartAllmaras, kε models and kω models. Using SA and kω models i have good results for Cl and Cd comparing with experimental results. But using the kε models (standard,rng,realizable) i have good results for Cl but bad results for Cd (as the angle attack increases Cd decreases!) Also i used enhanced wall treatment (y+=1). kε models cant solve correctly the drag coefficient in hydrofoils? Please could you help me? spk 
The problem is solved!

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