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Fluid flow passing through bluff bodies is of great concern in both natural and industrial activities.The formation and shedding of vortex generated at the rear part of the bluff bodies would have significant impact on the safety and stability of the bluff bodies,which are commonly seen in engineering structures.In this research,control of vortex induced excitations acting on a circular cylinder by employing a detached splitter plate is numerically studied for high Reynolds number flow.The detached plate is placed horizontally in the wake region.Flow quantities at the cylinder surface,such as drag forces and lift forces,are obtained and compared with the cases in which no plate is considered.The splitter plate evidently shows its effects on reducing the drag forces and lift fluctuations.This is significant in engineering design practices when high Reynolds number flow is considered.