Turbulent drag just on region 2, denoted as (Df,2)turbulent, refers to the aerodynamic drag caused by friction between a turbulent flow and the surface of a specific region 2 on an object, such as an airfoil or wing. This drag arises due to the chaotic and irregular motion of the fluid particles in the turbulent flow interacting with the surface of the designated region.Â
- (Df,2)turbulent: Turbulent drag in region 2
- (Df,c)turbulent: Total turbulent skin friction drag over the entire chord length
- (Df,1)turbulent: Turbulent drag in region 1