Numerical Simulation Of The Viscous Flows About A Drifting Ship In Shallow Water

Ship maneuvering behavior significantly changes according to water depth. Study the integral and field quantities to gain knowledge, which may be useful for improvements of the maneuvering models and of the ship's maneuvering characteristics and evaluate the safety navigation. However, study of ship behavior in shallow water often requires model tests in the past, but with the maturity of modern computational fluid dynamics techniques and software, researches can be carried out by numerical simulations using a flow solver.The paper presents the numerical simulation of the viscous flows around a drifting ship in shallow water and calculation of the hydrodynamic forces acting on the hull. Computations were performed, using a RANS equation code, to investigate the viscous flows about Series 60 model hull ( C B= 0.6) in static drifting motions at several different water depths, including deep water. For deep water, the intent is to investigate the ship behaviors at different drift angles; for shallow water, effects due to different drift angles and different water depths, such as generation of bilge vortices and vortices shedding, were analyzed in full detail. The results are in good agreement with the theory.The present work is part of a long-range research effort, which focuses on application and validation of RANS equations for maneuvering related flow problems.