Large-scale and small-scale contribution to the skin friction reduction in a modified turbulent boundary layer by a large-eddy break-up device

Abstract

In this work, we assess the contributions of large-scale and small-scale Reynolds shear stress events to the skin friction reduction of a turbulent boundary layer modified by a large-eddy break-up device, based on the quadrant analysis of Reynolds shear stress, the Fourier mode decomposition, and an extension of a skin friction decomposition scheme.