ASYMMETRIC BOUNDARY LAYER FLOW ABOVE SAND RIPPLES UNDER PROGRESSIVE WAVES

Proceedings of the International Conference on Coastal Engineering

Takao Toue²  Kazuo Nadaoka¹  Hidehiro Katsui² 

[1] Department of Mechanical and Environmental Informatics,Graduate School of Information Science and Engineering, Tokyo Institute of Technology;Dep. of Coastal and Hydraulics Eng.,Tech. Res. Center,Taisei Corp.

关键词: progressive waves;    boundary layer;    asymmetric flow;    ripples;   

DOI  :  10.9753/icce.v25.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

Boundary layer flow above sand ripples under both oscillatory flow and progressive waves is examined by two dimensional numerical simulation. The simulation shows the difference of the flow between under an oscillatory flow and progressive waves. The boundary layer flow under oscillatory flow is symmetric, on the other hand, the flow under progressive waves is asymmetric. The mechanism of the asymmetric flow is explained by the convection effects of progressive waves.

【 授权许可】

Unknown