VELOCITY DISTRIBUTION IN TRAPEZOID-SECTION OPEN CHANNEL FLOW WITH A NEW REYNOLDS-STRESS EXPRESSION  

作　　者：Ma ZhengShanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China, e-mail:mazh8888@sina. com 

出　　处：《Journal of Hydrodynamics》2003年第6期82-87,共6页水动力学研究与进展B辑（英文版）

基　　金：Project supported by Shanghai Key Subject Program

摘　　要：By considering that the coherent structure is the main cause of the Reynoldsstress, a new Reynolds stress expression was given. On this basis the velocity distribution in thetrapczoid-seclion open channel flow was worked out with the pseudo-spectral method. The results werecompared with experimental data and the influence of the ratio of length to width of thecross-section and the lateral inclination on the velocity distribution was analyzed. This model canbe used the large flux in rivers and open channes.By considering that the coherent structure is the main cause of the Reynoldsstress, a new Reynolds stress expression was given. On this basis the velocity distribution in thetrapczoid-seclion open channel flow was worked out with the pseudo-spectral method. The results werecompared with experimental data and the influence of the ratio of length to width of thecross-section and the lateral inclination on the velocity distribution was analyzed. This model canbe used the large flux in rivers and open channes.

关 键 词：coherent structure reynolds stress pseudo-spcclral method open channelflow velocity distribution 

分 类 号：O351[理学—流体力学]