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http://dx.doi.org/10.3744/JNAOE.2011.3.3.216

A hydrodynamic model of nearshore waves and wave-induced currents  

Sief, Ahmed Khaled (Department of Civil Engineering, Tottori University)
Kuroiwa, Masamitsu (Department of Civil Engineering, Tottori University)
Abualtayef, Mazen (Department of Environmental Engineering, the Islamic University of Gaza)
Mase, Hajime (Disaster Prevention Research Institute, Kyoto University)
Matsubara, Yuhei (Department of Civil Engineering, Tottori University)
Publication Information
International Journal of Naval Architecture and Ocean Engineering / v.3, no.3, 2011 , pp. 216-224 More about this Journal
Abstract
In This study develops a quasi-three dimensional numerical model of wave driven coastal currents with accounting the effects of the wave-current interaction and the surface rollers. In the wave model, the current effects on wave breaking and energy dissipation are taken into account as well as the wave diffraction effect. The surface roller associated with wave breaking was modeled based on a modification of the equations by Dally and Brown (1995) and Larson and Kraus (2002). Furthermore, the quasi-three dimensional model, which based on Navier-Stokes equations, was modified in association with the surface roller effect, and solved using frictional step method. The model was validated by data sets obtained during experiments on the Large Scale Sediment Transport Facility (LSTF) basin and the Hazaki Oceanographical Research Station (HORS). Then, a model test against detached breakwater was carried out to investigate the performance of the model around coastal structures. Finally, the model was applied to Akasaki port to verify the hydrodynamics around coastal structures. Good agreements between computations and measurements were obtained with regard to the cross-shore variation in waves and currents in nearshore and surf zone.
Keywords
Quasi-3D model; Wave-current interaction; Fractional step method; Surface roller; Coastal structures; Detached breakwater; Akasaki port;
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