A STUDY OF OSCILLATING FLOWS OVER PROPAGATING RIPPLES:PART I. STEADY STREAMING  

作　　者：Lu Xi yun Department of Modern Mechanics, University of Science and Technology of China, Hefei, 230026, P.R.China 

出　　处：《Journal of Hydrodynamics》1999年第4期16-23,共8页水动力学研究与进展B辑（英文版）

摘　　要：Oscillating flows over periodic ripples are numerically investigated by solving the two dimensional time dependent incompressible Navier Stokes equations in curvilinear coordinates for a wider range of the parameters of KC, Re and ε, in particular for the oscillatory flow over propagating ripples. In the oscillating flows over periodic ripples, circulation cells due to the streaming effect are formed, which can help redistribute suspended sediments. In the present study, the circulation patterns for both stationary rigid ripples and propagating ripples are investigated. The energy dissipation in the flow field is also discussed.Oscillating flows over periodic ripples are numerically investigated by solving the two dimensional time dependent incompressible Navier Stokes equations in curvilinear coordinates for a wider range of the parameters of KC, Re and ε, in particular for the oscillatory flow over propagating ripples. In the oscillating flows over periodic ripples, circulation cells due to the streaming effect are formed, which can help redistribute suspended sediments. In the present study, the circulation patterns for both stationary rigid ripples and propagating ripples are investigated. The energy dissipation in the flow field is also discussed.

关 键 词：oscillating flow RIPPLE steady streaming separation flow 

分 类 号：TV131[水利工程—水力学及河流动力学]