Numerical Simulation of Solitary Waves Propagating on Stepped Slopes Beaches

Q3 Engineering WSEAS Transactions on Fluid Mechanics Pub Date : 2022-06-28 DOI:10.37394/232013.2022.17.10

Fayçal Chergui, M. Bouzit

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引用次数: 1

Abstract

The objective of the current paper is to study the propagating and breaking of solitary waves on stepped slopes beaches, to simulate the shoaling and breaking, specifically the location of breaking point Xb, and solitary wave height at breaking Hb of solitary waves on the different stepped slopes. Ansys Fluent is used to implement the simulation, a two-dimensional volume of fluid (VOF) which is based on the Reynolds-Averaged Navier–Stokes (RANS) equations and the k–ε turbulence closure solver. The obtained results were firstly validated with existing empirical formulas for solitary wave run-up on the slope without stepped structure and are compared with the experimental and numerical results. The numerical computation has been carried out for several, configurations of beach slopes with tan ß= 1:15, 1:20, 1:25, wave height H0= 0.04, 0.06, 0.08m, water depth h0= 0.15, 0.2, 0.25m, and step height Sh= 0.025, 0.05, 0.075m. A set of numerical simulations were implemented to analyze shoaling and breaking of solitary waves, wave reflection, wave transmission, and wave run-up with various parameters wave heights, water depth, beach slopes, and Sh step height.

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坡滩上孤立波传播的数值模拟

本文的目的是研究孤立波在阶梯坡海滩上的传播和破碎，模拟不同阶梯坡上孤立波的变浅和破碎，特别是破碎点Xb的位置和破碎时的孤立波高Hb。Ansys Fluent用于实现模拟，这是一种基于雷诺平均纳维-斯托克斯方程和k–ε湍流闭合解算器的二维流体体积（VOF）。首先用现有的无台阶结构斜坡上孤立波爬高的经验公式对所得结果进行了验证，并与实验和数值结果进行了比较。对tanß=1:15、1:20、1:25，波高H0=0.04、0.06、0.08m，水深H0=0.15、0.2、0.25m，阶高Sh=0.025、0.05、0.075m的几种海滩斜坡形态进行了数值计算，以及具有各种参数的波浪爬高、水深、海滩坡度和Sh阶高。

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WSEAS Transactions on Fluid Mechanics Engineering-Computational Mechanics

CiteScore

1.50

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0.00%

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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.