机械
流量(数学)
明渠流量
雷诺应力
雷诺数
边界(拓扑)
加速度
分布(数学)
频道(广播)
流动分离
数学
几何学
边界层
物理
数学分析
经典力学
工程类
湍流
电信
作者
Haoyong Tian,Minghui Yu,Yujiao Liu,Huang Yu-yun,Peng Hu
出处
期刊:Water management
[Thomas Telford Ltd.]
日期:2020-10-26
卷期号:174 (2): 99-108
被引量:4
标识
DOI:10.1680/jwama.19.00100
摘要
The distribution of depth-averaged velocity is crucial to many engineering problems. This paper presents an analytical solution for the lateral depth-averaged velocity distribution in a 120° curved channel with asymmetric trapezoidal cross-sections in which the curved flow is not fully developed. The proposed analytical model was derived from the streamwise depth-integrated Reynolds-averaged Navier–Stokes equation, which considers the bed stress, Reynolds stress, secondary flow and local flow acceleration. In addition, practical boundary conditions are proposed to consider the trapezoidal cross-sections with linearly varying side beds and the flow separation at the inner bank near the bend entrance. The analytical solutions using the proposed model were found to be in good agreement with measured data. The main contributions of this study are the development of a conventional analytical model for sophisticated circumstances and the proposal of practical boundary conditions that consider flow separation.
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