Dynamics of the outflow and its effect on the hydraulics of two-layer exchange flows in a channel

作     者：Hesham Fouli David Z. Zhu 

作者机构：Department of Civil Engineering King Saud University P.O. Box 800 Riyadh 11421 Saudi Arabia Department of Civil and Environmental Engineering University of Alberta Edmonton AB Canada T6G 2W2 

出 版 物：《Theoretical & Applied Mechanics Letters》 (力学快报（英文版）)

年 卷 期：2011年第1卷第6期

页      面：26-30页

学科分类：080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

主　　题：exchange flows Kelvin-Helmholtz instabilities reservoirs and channel shear waves 

摘      要：This paper reports that an experimental study is conducted to examine the dynamics of the outflow in two-layer exchange flows in a channel connecting between two water bodies with a small density difference. The experiments reveal the generation of Kelvin-Helmholtz (KH) instabilities within the hydraulically sub-critical flow region of the channel. During maximal exchange, those KH instabilities develops into large-amplitude KH waves as they escape the channel exit into the reservoir. The propagation speed of those waves, their generation frequency and their amplitudes are studied. The dynamics of the outflow and these waves are directly linked to the hydraulic conditions of the exchange flow within the channel.