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Numerical Simulation of Wave Breaking Over a Submerged Step with SPH Method

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, P. R. China

E-mail Address: hongjiew@126.com

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Bing Ren

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, P. R. China

E-mail Address: bren@dlut.edu.cn

Corresponding author.

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Guoyu Wang

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, P. R. China

E-mail Address: wanggyu@dlut.edu.cn

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, and

Yumeng Zhao

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, P. R. China

E-mail Address: dutzhaoyumeng@gmail.com

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https://doi.org/10.1142/S2529807018400055Cited by:4 (Source: Crossref)

This article is part of the issue:

Special Issue on SPH in Coastal, Ocean and Hydraulic Engineering; Guest Editors: Bing Ren (Dalian University of Technology, China), Songdong Shao (The University of Sheffield, UK) and Ping Dong (University of Liverpool, UK)

Abstract

Wave breaking over a submerged step with a steep front slope and a wide horizontal platform is studied by smoothed particle hydrodynamic (SPH) method. By adding a momentum source term and a velocity attenuation term into the governing equation, a nonreflective wave maker system is introduced in the numerical model. A suitable circuit channel is specifically designed for the present SPH model to avoid the nonphysical rise of the mean water level on the horizontal platform of the submerged step. The predicted free surface elevations and the spatial distributions of wave height and wave setup over the submerged step are validated using the corresponding experimental data. In addition, the vertical distributions of wave-induced current over the submerged step are also investigated at both low and high tides.

Keywords:

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