Vortex evolution around submerged quartercircular and rectangular breakwaters due to water waves

被引：0
|
作者：
Jiang X. [1 ,2 ]
Hao M. [3 ]
Yang T. [1 ]
Li Y. [2 ]
机构：
[1] Tianjin Key Laboratory of Soft Soil Characteristics & Engineering Environment, Tianjin Chengjian University, Tianjin
[2] State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin
[3] School of Civil Engineering and Hydraulic Engineering, Ningxia University, Yinchuan
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2019年 / 40卷 / 03期
关键词：
Cnoidal wave; Submerged quartercircular breakwater; Submerged rectangular breakwater; Velocity field; Vortex; Vorticity field;
D O I：
10.11990/jheu.201710041
中图分类号：
学科分类号：
摘要：
Vortex evolutions of cnoidal waves propagating submerged rectangular and quartercircular breakwaters were numerically investigated. A 3D numerical wave tank was established based on Navier-Stokes equations. A porous slope was placed upstream toward the wave generator from the outflow boundary to absorb transmitted wave energy before it reached the outflow boundary. The porous slope reduced the reflection from the boundary and increased the precision of the numerical wave simulation. The porosity on the effect of eliminating wave was discussed. Flow separation and vortex evolution around the submerged quarter-circular and rectangular breakwaters were examined by capturing the velocity and vorticity fields at different phases over a wave cycle. Results show that for the submerged quartercircular and rectangular breakwaters with the same height, flow separation on the former occurs at the viscous layer closer to the leeside corner and causes stronger vortices with quicker moving, stretching, and dissipation, which forecasts more loss of transmitted energy. © 2019, Editorial Department of Journal of HEU. All right reserved.
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页码：614 / 622
页数：8
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