NUMERICAL STUDIES ON SLOSH-INDUCED LOADS USING COUPLED ALGORITHM FOR SLOSHING AND 3D SHIP MOTIONS

This paper reports the development of an efficient algorithm coupling ship motions with interior tank sloshing. The algorithm integrates a potential flow based solver for the ship motions with an open source viscous flow solver (OpenFOAM) for the interior sloshing. The ship motion problem is solved using a three dimensional forward speed transient Greens function method in the time domain. The internal tank sloshing problem is solved using a standard Finite Volume Method (FVM) based incompressible multiphase interface capturing Volume of Fluid (VoF) technique. The objective is to determine the influence of slosh motion on ship responses and in turn the modifications in the slosh-induced interior pressures and loads due to this coupling. The reason for influence of coupling on roll response is investigated. The maximum pressure at the interior of the tank considering uncoupled and coupled sloshing and ship motions is studied. Further numerical simulations are carried out considering simultaneous sloshing in two tanks.