Topographically controlled, breaking-wave-induced macrovortices. Part 2. Changing geometries
Topographically controlled, breaking-wave-induced macrovortices. Part 2. Changing geometries
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地形控制的碎波引起的宏观涡旋。
DOI：
10.1017/s0022112006009979
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发表时间：
2006
影响因子：
3.7
通讯作者：
E. Gutiérrez
中科院分区：
文献类型：
--
作者：
A. Kennedy;M. Brocchini;L. Soldini;E. Gutiérrez
这是研究破碎波引起的大涡行为的系列文章的第二部分。第一部分从理论上研究了起动条件下的一般行为，并给出了宽间距防波堤上大涡产生及其演变的计算结果。在本文中，我们扩展和测试定性和定量的一些基本结果的第1部分，特别是初始沿岸涡输送范围广泛的几何形状，从狭窄的离岸流地形孤立的防波堤。海岸线的存在被认为是必要的沿岸涡输送的代表。结果表明，涡运动范围从强烈离岸的情况下，一个狭窄的离岸流，强烈沿岸的情况下，一个孤立的防波堤。即使有显着的近似固有的分析预测，数值计算使用时域Boussinesq型方程和实验室实验证实的趋势。第三部分研究了孤立（单防波堤结构）或多个（裂流结构）水下结构物上波浪诱导流动的水平混合特征。
This is the second part of a series examining the behaviour of breaking-wave-induced macrovortices. The first part examined theoretically general behaviours during startup conditions, and gave computational results for macrovortex generation and their evolution on widely spaced breakwaters. In this paper, we extend and test qualitatively and quantitatively some of the basic results of Part 1, in particular the initial longshore vortex transport for a wide range of geometries ranging from narrow rip current topographies to isolated breakwaters. Accounting for the presence of a shoreline is found to be necessary for the representation of longshore vortex transport. Results show vortex motion ranging from strongly offshore in the case of a narrow rip current, to strongly longshore in the case of an isolated breakwater. Even with the significant approximations inherent in the analytical predictions, numerical computations using time-domain Boussinesq-type equations and laboratory experiments confirm the trends. Part 3 examines the horizontal mixing features of wave-induced flows over isolated (single-breakwater configuration) or multiple (rip-current configuration) submerged structures.