A NUMERICAL MODEL OF SHEET FLOW SEDIMENT TRANSPORT

Proceedings of the International Conference on Coastal Engineering

Sadakazu Katori²  Akira Watanabe¹  Masaru Mizuguchi³ 

[1] Department of Civil Engineering, University of Tokyo;Coastal Engineering Consultants Co., Ltd.;Department of Civil Engineering, Chuo University

关键词: sheetflow;    sediment transport;    numerical model;   

DOI  :  10.9753/icce.v25.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

Governing equations are derived for a numerical model to simulate the sediment motion under sheet flow condition. They consist of equations for the conservation of the horizontal momentum, the turbulence energy and the sediment mass. Values of coefficients in the governing equations are determined using the experimental results of Horikawa et al. (1982). The mean sediment transport rates during half a period of sinusoidally oscillatory flow are calculated and the computed values agree well with the experimental results of Sawamoto and Yamashita (1986). Computations are also made for the net transport rate in unsinusoidally oscillatory flow with and without superposed steady flow, showing a good agreement with the measurements of Dibajnia and Watanabe (1992). Finally the thickness of the sheet flow moving layers is computed and related to grain-flow parameters.

【 授权许可】

Unknown