Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 07, 2019 - November 08, 2019
Skin-friction drag reduction by combination of riblet surface and large-scale control of fully developed turbulent channel flows is investigated by direct numerical simulations. To discuss the effect, flow statistics and instantaneous vortical structures are shown. It was found that the drag reduction effect is enhanced by the combination of control techniques: vortical structures are generated by the Large-Scale control locally, but these are pushed-up by the riblet surface.
