Fundamental study on mixing layer and horizontal circulation in open-channel flows with rectangular embayment zone  

作　　者：Michio Sanjou Iehisa Nezu 

机构地区：[1]Department of Civil and Earth Resources Engineering,Kyoto University,Kyoto,Japan

出　　处：《Journal of Hydrodynamics》2017年第1期75-88,共14页水动力学研究与进展B辑（英文版）

摘　　要：A part of mean kinetic energy in a main-channel is used for production of a large-scale horizontal circulation in the side cavity. However, the details of the mechanism such as energy transport are poorly understood. Therefore, we conducted PIV mea- surements in a laboratory flume and compared space distributions of mean velocity components and Reynolds stress by varying a cavity geometry. In particular, a practical calculation method of Reynolds stress was also developed and its accuracy was examined by comparison with the measured data. Furthermore, contributions of components in an energy transport equation were revealed quantitatively.A part of mean kinetic energy in a main-channel is used for production of a large-scale horizontal circulation in the side cavity. However, the details of the mechanism such as energy transport are poorly understood. Therefore, we conducted PIV mea- surements in a laboratory flume and compared space distributions of mean velocity components and Reynolds stress by varying a cavity geometry. In particular, a practical calculation method of Reynolds stress was also developed and its accuracy was examined by comparison with the measured data. Furthermore, contributions of components in an energy transport equation were revealed quantitatively.

关 键 词：EMBAYMENT open-channel turbulence mixing layer Reynolds stress mean kinetic energy 

分 类 号：TV133[水利工程—水力学及河流动力学]