Numerical modeling of the hydrodynamics of standing wave and scouring in front of impermeable break waters with different steepnesses

Tofany, N and Ahmad, M.F and Kartono, A and Mamat, Mustafa and Mohd-Lokman, H (2014) Numerical modeling of the hydrodynamics of standing wave and scouring in front of impermeable break waters with different steepnesses. Ocean Engineering, 88. pp. 255-270. ISSN 0029-8018

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Abstract

The aim of this paper is to numerically study the effects of breakwater steepness on the hydrodynamics of standing wave and scouring process in front of impermeable breakwaters. A two-dimensional hydrodynamics model based on the Reynolds Averaged Navier–Stokes (RANS) equations and the Volume of Fluid (VOF) method was developed and then combined with an empirical sediment transport model. Comparisons with an analytical solution and experimental data showed the present model is very accurate in predicting the near bottom velocity and capable of simulating the scour/deposition patterns consistent with experimental data. It was found that the additional terms of bottom shear stress in the momentum equations are necessary to produce a physical scouring pattern. Different breakwater steepnesses produce different characteristics of standing wave, the steady streaming system, and scouring pattern in front of the breakwaters, which also affects the correlations between them. An additional analysis of the turbulence field parameters and the sediment transport rate was also performed. All these important information will be presented in details in this paper and can be worthwhile for designing the breakwater in coastal areas.

Item Type: Article
Keywords: The RANS-VOF model Standing wave Steady streaming system Scouring pattern Breakwater steepness
Subjects: Q Science > QA Mathematics
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TC Hydraulic engineering. Ocean engineering
Faculty / Institute: Faculty of Informatics & Computing
Depositing User: Prof Mustafa Mamat
Date Deposited: 05 Mar 2015 07:13
Last Modified: 05 Mar 2015 07:13
URI: http://erep.unisza.edu.my/id/eprint/2581

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