Showing papers by "Mohamed Gad-el-Hak published in 1983"

Interaction of Compliant Surfaces with Transitional and Turbulent Boundary Layers

Abstract: The motion of fluid over a surface which complies to the flow offers the potential for a rich variety of fluid/surface interactions. The fluid exerts surface stresses which can cause movement in the compliant surface, which in turn can result in significant changes in the basic flow properties. For example, the motion of air over a water surface creates an air/surface interaction crucial to the exchange of momentum as well as the transport of heat, moisture, and various chemicals. In the past several decades, attention has also focused on air or water flow over compliant solids. If the surface can be designed to comply to the flow, then the properties of the flow may be different from those for a rigid plate. In particular, the dynamic processes occurring in a turbulent boundary layer, e.g., bursts and low speed streaks, may be affected, as well as scalar and momentum transport. Much of the past work has addressed the possibility of designing the properties of the compliant surface in order to reduce the momentum transport and hence the drag.