S053076 Necklace Vortex Behavior around a Square Plate Protuberance Normal to Laminar Boundary Layer Flow

Abstract

The behavior of necklace vortices around a square flat plate in the laminar boundary layer on the floor wall was investigated by using visualization and PIV measurement. It was found that the relative stagnation height s/h gradually decreased with increasing the plate height compared with the boundary layer thickness. The main vortex center position and the maximum vorticity normalized by using the stagnation height were almost constant in the range of Re>700.