Resistance Calculation and Motions Simulation for Free Surface Ship Based on CFD

An unsteady Reynolds averaged Navier–Stokes method is developed to account for sinkage and trim effects in the calculation of steadily advancing surface ship. Volume of fluid method (VOF) is devised for the treatment of free surface. The sinkage and trim were predicted by using dynamic mesh technology, and the motion of ship is controlled by six degrees of freedom (6DOF) code. Predicted results for sinkage and trim and resistance at seven Froude numbers (from Fn= 0.15 to Fn= 0.45) were compared against experimental data, showing good agreement. A plenty of numerical simulations for resistance of ship model under different running attitudes are carried out. On these bases, the results of numerical simulation and the factors which affect ship resistance are analyzed, the formulas for calculating the ship resistance under different drafts and longitudinal trims and arbitrary drift-trim coupled running attitudes are deduced and validated. © 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Kunming University of Science and Technology