WAVE-STRUCTURE INTERACTION USING SMOOTHED PARTICLE HYDRODYNAMICS

Navier-Stokes computations of a wave-structure interaction are performed with the aim of assessing the potential of Smoothed Particle Hydrodynamics to accurately estimate impact loading time-history. A three-dimensional dam-break flow with a rectangular column located downstream is considered. The net force exerted on the column is monitored throughout the simulation with the results correlating well with existing experimental data. Simulation parameters including: particle resolution, fluid viscosity, gate opening times and boundary treatments are varied and their affect on the load imparted to the column are investigated. NOMENCLATURE b, k all ‘fluid ’ and ‘boundary ’ particles within a radius 2h of r respectively cs sound speed D Dt substantial derivative f force per unit mass vector g gravitational acceleration vector h interpolation length I Impulse of the net force mb, rb, vb mass, position and velocity of particle b n number of particles ˆ kn unit normal directed away from the boundary particle P dynamic pressure ⊥r and x are the perpendicular and tangential distances from the boundary particle to the fluid particle t time W interpolation kernel ∇ differential operator Δp initial particle spacing δt simulation incremental time step Π viscous term μ dynamic viscosity ρ densit