Application of the Goore Scheme to turbulence control for drag reduction (II) - Application to turbulence control -

In Part I , we extended the capability of the Goore Scheme for application to multi -dimensional problems and improved convergence performance. In this paper, we apply the improved Goore Scheme to the control of turbulence for drag reduction. Direct numerical simulations combined with the control scheme are carried out to simulate a controlled turbulent channel flow at low Reynolds number. The wall blowing and suction is applied through the Goore algorithm using the total drag as feedback. An optimum distribution of the wall blowing and suction in terms of the wall-shear stresses in the spanwise and streamwise directions is sought. The best case reduces drag by more than 20 %.