Reduction of Cd in circular cylinder using three passive control at Re=500

Abstract

Passive control is the addition of a small object to an object to reduce the drag force of the object. This study focuses on three passive controls. Numerically, the problem of three passive controls for drag reduction of circular cylinder is studied. In this case, three passive controls are placed in front of and in the rear of the main object. A passive control type-I is in front of circular cylinder while the others are in rear. The distance of the passive controls is varies to the circular cylinder. In this study, we want to find an effective distance of the main object to three passive controls from the shape and the angle position of the passive controls.