In this paper we propose a three-dimensional numerical study of the coastal currents produced by the wave motion in the area opposite the Cetraro harbour (Italy), during the most significant wave event for the coastal sediment transport. The aim of the present study is the characterization of the current patterns responsible for the siltation that affects the harbour entrance area and the assessment of a project solution designed to limit this phenomenon. The numerical simulations are carried out by a three-dimensional non-hydrostatic model that is based on the Navier–Stokes equations expressed in integral and contravariant form on a time-dependent curvilinear coordinate system, in which the vertical coordinate moves in order to follow the free surface variations. The numerical simulations are carried out in two different geometric configurations: a present configuration, that reproduces the geometry of the coastal defence structures currently present in the harbour area and a project configuration, which reproduces the presence of a breakwater designed to modify the coastal currents in the area opposite the harbour entrance.

中文翻译：

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塞特拉罗港沿岸地区波浪诱导流的三维数值研究（意大利）

在本文中，我们提出了一个三维数值研究，在沿海沉积物运输的最重要波浪事件期间，Cetraro 港口（意大利）对面地区的波浪运动产生的沿海水流。本研究的目的是描述影响港口入口区域的淤积的当前模式，并评估旨在限制这种现象的项目解决方案。数值模拟是通过三维非流体静力模型进行的，该模型基于 Navier-Stokes 方程，在瞬态曲线坐标系上以积分和逆变形式表示，其中垂直坐标移动以遵循自由表面变化。数值模拟在两种不同的几何配置中进行：