A Method for the Control of the Coanda Effect

Abstract

In this paper, using Computational Fluid Dynamics (CFD), we investigate a passive flow control system using a thin channel, a channel that connects two different pressure points on a convex surface. The tendency to redistribute the pressure on the surface will maintain the jet attached to the convex surface, thus enhancing the Coandã effect. Numerical results on two-dimensional and three-dimensional configurations show that the jet can be kept attached to the surface for a longer distance and deflected, in our simulations, with approx. 8° towards the direction of the jet in the configuration without channel.