Investigation of Ship-to-Ship Interaction during a Lightering Operation in Shallow Water Using a RANS Solver

摘要

Using a steady state Reynolds Averaged Navier-Stokes solver, a numerical study of the ship-to-ship interaction during a lightering operation is performed. Five different combinations of water depth, speed, and ship-to-ship distance in the transverse and longitudinal directions are considered. Since the speed is low, a double model approximation is adopted. Propeller forces are approximated by a lifting line potential flow model. The wave pattern, pressure distribution and forces and moments acting on the two hulls are predicted. A very good correspondence between the measured and computed waves is noted, indicating that the pressure distribution on the free surface is well predicted. Assuming that the pressure distribution is accurate also on the hull, the variation in forces and moments between the cases is explained. Comparisons with measured data and with similar computations carried out elsewhere are made. It is seen that the present results correspond better with the other computations than with the data.