Control techniques in flow past a cylinder- A Review

Flow past circular cylinder is known to be one of the fundamental concepts of fluid mechanics. The fields of application where it is important to study the flow past bluff bodies are offshore and marine engineering, marine pipe lines. In structural applications like flow around chimney stacks, long span bridges, transport ships, tall buildings, towers, pillars, heat exchangers, cables etc, it is important to reduce vortex induced vibrations, drag and lift force acting on them in-order to prevent structural damage. Therefore, it is necessary to adapt control techniques in flow past circular cylinder to reduce structural damage and improve the service life of cylinder used for particular application. The various control techniques are discussed and the effect of those techniques in modifying the wake flow structure is highlighted in this work.