Development of a projection-based SPH method for numerical wave flume with porous media of variable porosity

作者: Abbas Khayyer , Hitoshi Gotoh , Yuma Shimizu , Kohji Gotoh , Hosein Falahaty

DOI: 10.1016/J.COASTALENG.2018.05.003

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摘要: Abstract The paper presents a numerical wave flume with porous media of variable porosity. A fully-Lagrangian computational method is developed for simulation fluid flow interactions based on projection-based (or Incompressible) SPH (Smoothed Particle Hydrodynamics) method. continuity and Navier-Stokes equations are reformulated incorporation volume fraction, two-phase mixture theory. proposed benefits from set enhanced schemes therefore referred to as Enhanced Incompressible (ISPH). effect represented by considering linear nonlinear resistance force terms well newly-derived source term PPE (Poisson Pressure Equation). results characterized smooth continuous pressure fields, regular particle distributions at the fluid-porous interface in absence any artificial smoothing schemes. Since local fraction phase particles consistently calculated surrounding particles, capable accurately reproducing spatially varying media. Validations made through benchmark tests including U-tube uniform multi-layered media, rapid seepage flows rockfill dam, solitary attenuation over bed, interaction submerged structure propagation triangular permeable bar.

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