Abstract
The force which such a model as a cylinder or a square cylinder receives from an uniform flow is well known to be reduced by the small objects arranged in the upstream side of the model. In this study, the effect of the number of the small objects, their arrangement and their shapes on the flow around a cylinder is examined using a flow visualization.
The location of vortex in the downstream side of a cylinder and Strauhal number of vortex releasing are examined using the obtained images in this study. And, the location of the vortex is also examined in the case of the plate arranged in the downstream side of a cylinder.
