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Wave-adjusted boundary condition for longshore current in finite-volume circulation models

机译：有限体积环流模型中近岸流的波调整边界条件

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摘要

Numerical modeling of coastal circulation encompassing the nearshore requires forcing by tide, surface gravity waves, and possibly other factors. In the nearshore, the wave-induced longshore current and setup are dominant hydrodynamic processes, and lateral boundary conditions representing tide and oceanic forcing typically do not include surface-wave contributions. Without proper boundary conditions, significant gradients in current and water level can occur that contaminate the solution in the internal domain. A standard strategy is to place the boundaries far from the site of interest, but this strategy greatly increases computational demands, and it may not be appropriate for long-term simulations. This paper describes a wave-adjusted boundary condition that accounts for wave-induced water level and current acting in combination with tidal forcing. The wave-adjusted boundary condition is demonstrated for an idealized case of a parallel-contour beach and for an engineering application at Ocean City, MD.
机译：包括近岸在内的沿海环流的数值模拟需要受潮汐，地表重力波和其他可能因素的强迫。在近岸，波浪引起的近岸水流和装置是主要的水动力过程，代表潮汐和海洋强迫的横向边界条件通常不包括面波贡献。没有适当的边界条件，电流和水位会出现明显的梯度，从而污染内部区域的溶液。一种标准的策略是将边界放置在距目标站点较远的位置，但是该策略极大地增加了计算需求，因此可能不适用于长期仿真。本文描述了一种波浪调整的边界条件，该条件考虑了波浪诱发的水位和与潮汐强迫相结合作用的水流。在马里兰州大洋城，对平行轮廓海滩的理想情况和工程应用进行了波调整边界条件的演示。

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