Numericalsimulation of 2D regular wave overtopping flows over the crest of a trapezoidalsmooth impermeable seadike
Numericalsimulation of 2D regular wave overtopping flows over the crest of a trapezoidalsmooth impermeable seadike
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梯形光滑防渗海堤坝顶二维规则波溢流数值模拟
DOI：
10.1061/(asce)ww.1943-5460.0000234
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Guoping Miao
中科院分区：
文献类型：
--
作者：
Xiaoyu Guo;Benlong Wang;Hua Liu;Guoping Miao
摘要本文旨在发展一套两相流求解器，并探讨二维规则波越堤流场。求解器是基于Navier-Stokes方程和经典的Smagorinsky涡粘性模型。在数值波浪水槽中实现了波浪生成与消波的耦合，有效地消除了工作区的波浪反射。通过波浪爬高和破碎过程的数值模拟，验证了数值波浪水槽的有效性。讨论了湍流粘性系数和网格加密对破碎波模拟的影响。本文系统地研究了非破碎波和破碎波作用下海堤越浪的水流特性。数值结果表明，堤顶沿着土层厚度呈指数规律衰减，而堤顶最大流速沿着呈缓慢增加的趋势。更进一步...
AbstractThe objectives of the current study are to develop a two-phase flow solver and to investigate the two-dimensional regular wave overtopping flow field over a sea dike. The solver is based on the Navier-Stokes equations and the classical Smagorinsky eddy-viscosity model. A coupled approach of wave generation and absorption is accomplished in the numerical wave flume, and the wave reflection from the work zone can be eliminated efficiently. Simulations of the wave run-up and breaking were performed to validate the effectiveness of the numerical wave flume. The influences of turbulent eddy viscosity and grid refinement on the simulations of the breaking waves are discussed. The flow features of wave overtopping over a sea dike are investigated systematically for both nonbreaking and breaking waves. The numerical results show that the layer thicknesses along the dike crest decay following an exponential rule, whereas the maximum velocities along the dike crest exhibit a mild increasing trend. Furthermo...