view:41896 Last Update: 2021-9-11
Roozbeh Saghatchi, Jafar Ghazanfarian, Mofid Gorji-Bandpy
Numerical Simulation of Water Entry and Sedimentation of an Elliptic Cylinder using Smoothed-Particle Hyrodynamics
This paper studies the two-dimensional water entry and sedimentation of elliptic cylinder using the sub-particle scale (SPS) turbulence model of a Lagrangian particle-based Smoothed-Particle Hydrodynamics (SPH) method. The motion of the body is driven by the hydrodynamical forces and gravity. The present study shows the ability of SPH method in the simulation of nonlinear free surface problems as well as multiphase flow problems. The full Navier-Stokes equations along with the continuity have ben solves as the governing equations of the problem. The accuracy of the numerical code is verified using the case of water entry and exit of a circular cylinder . The numerical simulations of the water entry and sedimentation of the vertical and horizontal elliptic cylinder with diameter ratio of 0.75 are performed at Froude numbers of 0, 2, 5, 8 and specific gravities of 0.5, 0.75, 1, 1.5, 1.75, 2 and 2.5. The effect of governing parameters and vortex shedding behind the elliptic cylinder on the trajectory curves, velocity components in the flow field, rotation angle and velocity of elliptic cylinder, and the deformation of free surface for two cases have been investigated in details.