Abstract
Dissimilar control in turbulent flow in a channel with streamwise wave-like wall deformation is investigated by means of direct numerical simulation (DNS). We investigated three modes: sinuous mode, varicose mode, and one-side mode (the upper plate is a flat plate, and the lower plate is traveling wave wall) with upstream or downstream wave-like wall deformation. In all cases, analogy factor j/f is found to be less than unity and approaches unity with time. Dissimilarity is observed most strongly in the sinuous and varicose modes in the downstream wave case.
