Numerical modeling of the hydrodynamics of standing wave and scouring in front of impermeable breakwater with different steepnesses
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Date
2014Author
Tofany, Ahmad
Ahmad, M.F
Kartono, Agus
Lokman, H. Mohd
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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.
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