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SHIP MOTIONS SIMULATION USING FINITE VOLUME SOLVER

Iu this pap er, an integrated comput at ional procedure for th e simul ation of a two-phase flow, as well as floating and submerged body motion s, is presented, bas ed ou a Volume of Fluid (VoF) - fractional ste p coupling. Two fluids are modeled as a single cont inuum, with a fluid property jump at th e interface, by solving a scal ar transport equatiou for th e volume fraction. In addition , the conservation equat ions for mass and momentum are solved usiug t he fractional ste p method. Based on th e integratiou of st resses over a body, act ing forces and momeuts are calculated. The strategy of non-orthogonal body-attached mesh and calculation of the motion s at each tim e step, result in the time history of floating or submerged body motions. The motion simulat ion st rategy is evalna ted by using a cylinder wat er ent ry test case. To demonstrate the capability of th e simulat ion, barge resistance is also calculat ed in two cases of fixed and free motion (2-DoF ). All of the results are in good concordance with experimental data. and the present method can be extended for the full nonlinear motion of ships in waves.