SPH-DEM Modeling of the Hydraulic Stability of 2D Blocks on a Slope
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 140, Issue 6
Abstract
The numerical simulations of wave interactions with armor blocks on rubble-mound breakwaters will enable a stronger understanding of breakwater failure and therefore increased malfunction prevention. This paper presents a two-dimensional (2D) SPH-DEM model, which combines smoothed particle hydrodynamics (SPH) and the discrete-element method (DEM) to simulate the wave-structure interaction on a slope and predict the hydraulic stability of the 2D structure. A particle method combined with a Riemann solver evaluates the hydrodynamic loads on the discrete blocks, while a multisphere DEM describes the movement of the solids from the wave attacks. An interfacial force-balance condition enables coupling between the fluids and the solids. A series of experimental tests were conducted to validate the SPH model. The simulation of water entry of the wedge was compared with previous experiments. The wave interactions with massive cross-shaped blocks on a slope were also simulated in 2D. Numerical results are presented showing the details of large deformations of the free surface on the slope, the velocity field, and the hydraulic pressures on the armor units, and the nature of the changes in position of the blocks near the toe of the slope during the wave attack. These results facilitate an improved understanding of the interaction between waves and breakwaters.
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Acknowledgments
The authors acknowledge the valuable comments of the reviewers. The paper is funded by the National Natural Science Foundation of China under grant No. 51179030 and Innovative Research Group National Natural Science Foundation of China under Grant No. 51221961.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 140 • Issue 6 • November 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Mar 31, 2013
Accepted: Nov 22, 2013
Published online: Nov 25, 2013
Discussion open until: Aug 11, 2014
Published in print: Nov 1, 2014
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