SPH Modeling of Wave Transformation over a Coral Reef with Seawall
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 145, Issue 1
Abstract
Wave transformations over a coral reef with a steep front slope were comparatively studied using both laboratory tests and smoothed particle hydrodynamic (SPH) modeling. In the numerical model, nonreflective generation and absorption of waves were realized by adding a source term and a velocity attenuation term into the governing momentum equation. The physical and numerical models were carefully designed so that the nonphysical rise of the mean water level over the reef was avoided. Experimental and numerical results on the free surface elevations and the spatial distributions of wave height and wave setup over the reef with and without a vertical seawall were compared and good agreements were obtained. The cross-spectral transfer of wave energy from the peak frequency to the lower and higher frequencies, the vertical distributions of wave-induced current over the reef, and the effects of the seawall position on the maximum wave setup and wave run-up are discussed.
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Acknowledgments
The improved SPH code used in this paper was developed from the open source parallel SPHysics code. The authors are appreciative to all the developers and contributors of the open source code. This work was supported by the Ng Teng Fong Charitable Foundation through Tsinghua University Education Foundation (TUEF), the National Natural Science Foundation of China under Grant 51679032, and the Open Foundation of the State Key Laboratory of Coastal and Offshore Engineering at Dalian University of Technology under Grant LP1721.
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Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 145 • Issue 1 • January 2019
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© 2018 American Society of Civil Engineers.
History
Received: Dec 7, 2017
Accepted: May 25, 2018
Published online: Sep 21, 2018
Published in print: Jan 1, 2019
Discussion open until: Feb 21, 2019
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