Abstract
In this study,we investigate the control of self-sustained oscillating flows over an open cavity using a sliding bottom wall.The three-dimensional incompressible Navier-Stokes equations are solved usmg finite difference methods.A series of simulation are performed for a variety of bottom wall velocity from u_w = -0.1 to u_w = -1.0 with a length-to-depth ratio of L/D = 2.0.The results show that velocity fluctuations and pressure fluctuations are suppressed due to shear stress on bottom wall of cavity.The most effective condition of bottom wall velocity is u_w = -0.34.The control method by sliding bottom wall can suppress self-sustained oscillating flows over cavity.
