Why CFD is tough on drag coefficient prediction of airfoil -- CFD Online Discussion Forums

December 22, 2020, 06:54	Why CFD is tough on drag coefficient prediction of airfoil	#1
BastianNK New Member Join Date: Dec 2020 Posts: 8 Rep Power: 5	Hello, For airfoil CFD, why it is typically thought it is not easy for CFD to have drag coefficient prediction as good as lift prediction? Is it about turbulence modeling or transitional flow?

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