Control of Flow Past a Circular Cylinder Using a Rotating Control Rod

Control of flow past a circular cylinder using rotating control rod is investigated by conducting two-dimensional numerical simulations with Reynolds number 200, rod-to-cylinder diameter ratio 0.2, gap position angles the between 0° and 180°, rotation rates −7 7. The rate positive if rotates in anticlockwise direction. aim this paper to discover effects angle on control. If placed at side (position = 90°) or nearly 45° 135°), affects three ways, depending its rate: (1) strong negative weakens free shear layers reduces lift; (2) through interferes vortex shedding when small either direction; (3) enhances increases lift coefficient. Placing immediately front behind 180°) causes reduction coefficient for all rates.