Abstract: Two-dimensional unsteady incompressible Navier-Stokes equation is solved and characters of the flowfield past a rotating oscillation circular cylinder in uniform flow are systematically studied in this paper. By changing the oscillation parameter, the features of the force on the circulor cylinder and the wake behind the cylinder are analyzed. Numerical results show that similar to a cylinder performing oscillation laterally and streamwise, rotating oscillation is a very effective method for flow control.

Key words: Na vier-Sto kes equatio ns, ro tating oscillatio n circular cylinder, flow co nt ro l