Abstract
The purpose of the present study is to measure and investigate unsteady flows inside and outside a hollow circular cylinder with sudden rotating and stopping in a uniform flow and finally in order to obtain some fundamental data about the virtual mass effect. The flows inside and outside a hollow cylinder which is made of transparent acrylic resin are visualized by the particle tracer technique and analyzed using the PIV technique based on the two-dimensional binary image cross-correlation method. As a result, the unsteady whole field flows are discussed.
