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Two dimensional SPH simulation of water waves generated by underwater landslide

DU Xiao-tao, WU Wei, GONG Kai, LIU Hua(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiaotong University,Shanghai 200030,China)  
Landslide-generated water waves have always been of great interest to hydraulic and coastal engineers because the large deformation and breaking of the free surface bring great challenges for theoretical and numerical studies.The two-dimensional underwater landslide is studied numerically by using the Smoothed Particle Hydrodynamics(SPH) method.Numerical examples show the computed results are in good agreement with the experimental ones.It demonstrated that SPH method can deal with the hydrodynamic flows generated by landslides in reservoir or coastal waters,and the SPH method has the superiority in simulating the phenomena of large deformation of the free surface.The simulation result shows the second plunging during the sliding of the box.Two vortices with opposite directions were observed above the box after it slide on the bottom of the numerical flume.The vortex will maintain for a long time even the water surface recovering to a calm surface.The effects of sliding velocity on the number of plunging and the number of vortex induced by landslides are discussed through numerical experiments.
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