Abstract

Based on the open source codes OpenFOAM, a three-dimensional numerical wave flume is developed. An incompressible two-phase flow solver is used to solve the Reynolds-Averaged Navier-Stokes (RANS) equations. The air-water interface is captured via Volume of Fluid (VOF) technique. A momentum distribution source term is introduced into the momentum equations for wave making. Regular wave overtopping over sloping coastal breakwater with different water depths and wave heights are simulated by this model. Comparisons between numerical results and available experimental data show satisfactory agreement. The numerical model can effectually solve a wide range of cases including wave interaction with structures both in two and three dimensions.

Introduction

Seawall is common coast protection engineering structure. Wave overtopping affects the normal use of the rear area, seriously even affects the stability of seawalls. Therefore it is considered as an important issue for the design of seawalls. In the last decades, more and more scholars and researchers are researching wave overtopping by numerical and physical simulation.

Saville (1955) did a series of wave runup and overtopping experiments with different scale and summed estimated mean wave overtopping experience Formula. Hu (2002) based on shallow water equations to simulate the waves on the slope and the vertical breakwater. Lynet (2010) based on the Boussinesq model to simulate the overtopping process of storm surge wave. Liu (2007) based on Reynolds-Averaged Navier-Stokes (RANS) equation develop a numerical wave tank in the frame of FLUENT, simulated regular wave overtopping over the crest of an impermeable coastal structure located on a sloping beach. Karagiannisn (2015) developed and implemented with the open source toolbox OpenFoam and the additional toolboxwaves2Foamin order to investigate the wave overtopping physical process on inclined impermeable structures.

This study developed a numerical wave tank model based on OpenFOAM open source software through modifying the source terms of momentum equations by distributed sources. Regular wave overtopping over sloping coastal breakwater with different slops, water depths and wave heights are simulated by this model. Comparisons between numerical results and available experimental data show satisfactory agreement.

This content is only available via PDF.
You can access this article if you purchase or spend a download.