Can large-scale oblique undulations on a solid wall reduce the turbulent drag?
Can large-scale oblique undulations on a solid wall reduce the turbulent drag?
Direct numerical simulations of fully developed turbulent channel flows with wavy walls are undertaken. The wavy walls, skewed with respect to the mean flow direction, are introduced as a means of emulating a Spatial Stokes Layer (SSL) induced by in-plane wall motion. The transverse shear strain above the wavy wall …