波浪破碎模拟的边界条件

Q3 Engineering

WSEAS Transactions on Fluid Mechanics Pub Date : 2020-02-21 DOI:10.37394/232013.2020.15.4

Benedetta Iele, F. Palleschi, F. Gallerano

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引用次数: 4

摘要

本文提出了一种新的波浪破碎数值模拟模型。三维运动方程以积分逆变形式表示，并在能够表示沿海地区复杂几何形状的曲线边界一致性网格上求解。提出了一种随时间变化的纵坐标变换，该变换是湍流波边界层振荡的函数。提出了一种新的数值格式来模拟所得方程。提出了用逆变形式表示的运动方程在自由表面和底部的新的边界条件。为了正确地模拟破碎波的高度，我们分析了在振荡湍流边界层内最接近底部的计算网格单元中心的正确位置的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Boundary Conditions for the Simulation of Wave Breaking

In this paper we propose a new numerical model for the simulation of the wave breaking. The three-dimensional equations of motion are expressed in integral contravariant form and are solved on a curvilinear boundary conforming grid that is able to represent the complex geometry of coastal regions. A time-dependent transformation of the vertical coordinate that is a function of the oscillation of the turbulent wave boundary layer is proposed. A new numerical scheme for the simulation of the resulting equations is proposed. New boundary conditions at the free surface and bottom for the equations of motion expressed in contravariant form are proposed. We present an analysis of the importance of the correct positioning, inside the oscillating turbulent boundary layer, of the centre of the calculation grid cell closest to the bottom, in order to correctly simulate the height of the breaking waves.

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来源期刊

WSEAS Transactions on Fluid Mechanics Engineering-Computational Mechanics

CiteScore

1.50

自引率

0.00%

发文量

期刊介绍： WSEAS Transactions on Fluid Mechanics publishes original research papers relating to the studying of fluids. We aim to bring important work to a wide international audience and therefore only publish papers of exceptional scientific value that advance our understanding of this particular area. The research presented must transcend the limits of case studies, while both experimental and theoretical studies are accepted. It is a multi-disciplinary journal and therefore its content mirrors the diverse interests and approaches of scholars involved with multiphase flow, boundary layer flow, material properties, wave modelling and related areas. We also welcome scholarly contributions from officials with government agencies, international agencies, and non-governmental organizations.