Numerical Investigation of Solitary Wave Interaction with Double Row of Vertical Slotted Piles
Publication: Journal of Engineering Mechanics
Volume 144, Issue 1
Abstract
Destructive tsunami waves may cause failure of the pile-supported nearshore structures, hence, accurate prediction of tsunami wave interaction with piles is a primary engineering concern in the field of coastal management and hazard mitigation. This study numerically investigated tsunami-like solitary waves propagating over a surface-piercing double row of vertical slotted piles. A three-dimensional numerical wave tank based on an open-source computational fluid dynamics (CFD) tool was developed in this study. The Navier-Stokes equations for two-phase incompressible flow were solved using the large eddy simulation (LES) method for turbulence closure and the volume of fluid (VOF) method for tracking the free surface. Laboratory measurements of the wave, flow, and dynamic pressure were performed to validate the numerical model. The model was then applied to examine the three-dimensional distribution of free-surface elevation and the vertical distribution of dynamic pressure in the vicinity of the piles. Via numerical results, the variations of wave runup and impact force on the piles were also analyzed in view of the wave nonlinearity and the ratio of pile spacing to its diameter. Finally, the drag coefficients were discussed through the Morison equation to account for the interfering effects among the piles.
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Acknowledgments
This study was supported financially by the National Natural Science Foundation of China (51679014, 51609211), the Scientific Research Fund of the Hunan Provincial Education Department, China (14B002), the Open Foundation of State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology (LP1510, LP1606), and the Open Foundation of Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province (2016SS03).
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Published In
Journal of Engineering Mechanics
Volume 144 • Issue 1 • January 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Nov 28, 2016
Accepted: Jun 28, 2017
Published online: Oct 31, 2017
Published in print: Jan 1, 2018
Discussion open until: Mar 31, 2018
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