Rotary Oscillation Control : Bluff -body flow control (drag reduction) is studied via the behaviour of flow past a circular cylinder at high Reynolds number, where the cylinder executes rotary oscillation. It has been established experimentally that significant drag reduction is possible at very high Reynolds number by rotary oscillation, the present approach is via numerical simulation of Navier-Stokes equation to understand the mechanism that causes drag reduction. We claim that the drag reudction is by two main mechanism- both possible with 2D flows, as explained in the following presentation, for a M. Tech. thesis defence, by Mr. T.V.K. Rupesh:


  1. Powerpoint presentation (.ppt)