Perpustakaan Digital ITB

It has recently been shown by Wei and Klewicki [Phys. Rev. Fluids 1, 082401 (2016)] that in a zero-pressure-gradient turbulent boundary layer flow, the product of the nondimensional free-stream velocities in the streamwise (U+?) and wall-normal (V+?) directions is the flow shape parameter (H): U+?V+? = H. It is suggested here that this result is a consequence of the variation of the Reynolds shear stress with U?V in the outer region of the boundary layer.