Two-dimensional wave-current interaction with a locally enriched quadtree grid system |
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Authors: | Koo-Yong Park Alistair GL Borthwick Yong-Sik Cho |
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Institution: | aHyundai Engineering and Construction Co., 140-2 Kye-dong, Chongro-gu, Seoul 110-793, South Korea;bDepartment of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK;cDepartment of Civil Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea |
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Abstract: | Wave-induced currents may drive nearshore mixing and transport processes, including coastal pollutant dispersion, littoral drift, and long-term morphological changes through beach erosion and accretion. In this study, a numerical model is newly developed to simulate wave climate and localized currents in complicated coastal environments. The model developed is based on a quadtree grid system. The two-dimensional hydrodynamic governing equations are solved by using an explicit Adams-Bashforth finite difference scheme. Effects of wave breaking, shoaling, refraction, diffraction, wave-current interaction, set-up and set-down, turbulent mixing, bed friction, and shoreline movement are incorporated in the model. Results are presented for set-up at a beach in a flume due to normally incident waves, and longshore currents generated by oblique waves on a plane beach. |
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Keywords: | Water wave Surf-zone hydrodynamics Quadtree grid system Wave-current interaction |
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