Numerical simulation of wave interaction with porous structures using an improved smoothed particle hydrodynamic method |
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| Institution: | 1. The State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2. School of Engineering, Physics and Mathematics, University of Dundee, DD1 4HN, United Kingdom;1. Dipartimento di Ingegneria Civile, Università della Calabria, via Bucci, cubo 42B, 87036 Arcavacata di Rende, CS, Italy;2. Facoltà di Ingegneria, Università degli Studi eCampus, via Isimbardi 10, 22060 Novedrate, CO, Italy;1. Department of Civil and Environmental Engineering, Old Dominion University, Norfolk, VA, USA;2. Center for Applied Coastal Research, University of Delaware, Newark, DE, USA;3. Department of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan, Taiwan;1. Flanders Hydraulic Research, Berchemlei 115, 2140 Antwerp, Belgium;2. Dept. of Civil Engineering, Ghent University, Technologiepark 904, 9052 Ghent, Belgium;3. Environmental Physics Laboratory, Universidade de Vigo, Campus As Lagoas s/n, 32004 Ourense, Spain |
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| Abstract: | A smoothed particle hydrodynamic (SPH) model is developed to simulate wave interaction with porous structures. The mean flow outside the porous structures is obtained by solving Reynolds Averaged Navier–Stokes (RANS) equations and the turbulence field is calculated by a large eddy simulation (LES) model. The porous flow is described by the spatially averaged Navier–Stokes type equations with the resistance effect of the porous media being represented by an empirical frictional source term. The interface boundaries between the porous flow and the outside flow are modeled by means of specifying a transition zone along the interface. The model is validated against other available numerical results and experimental data for wave damping over porous seabed with different levels of permeability. The validated model is then employed to investigate wave breaking over a submerged porous breakwater and good agreements between the SPH model results and the experimental data are obtained in terms of free surface displacement. In addition the predicted velocity, vorticity and pressure fields near the porous breakwater and in the breaking wave zone are also analyzed. |
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