Abstract
We can affect various fields by studying the cylinder. We presents the results of the PIV in the boundary layer with a rotary cylinder put during the smooth flow. Unlike the boundary layer which developed on the fixed wall, it was revealed that a Gortler vortices developed in the boundary layer. In addition, I knew that a detachment position, a detachment shape and the shape of the whirlpool changed by the circumferential speed ratio, having ditch or not of the cylinder, a direction and a measurement section.
