RANS Computations of Added Resistance and Motions of Ship in Head Waves

摘要

The RANS computations of a ship with sink and trim motion in headwaves are presented. The added resistance, heave and pitch motions areinvestigated numerically. The computations are based on volume offluid (VOF) and dynamic deformation mesh methods, discretized byfinite volume method (FVM). A six-degrees-of-freedom (6DoF)module is implemented to predict the motions of ship. Four waveconditions with a wide range of wave steepness (0.025 ≤ ak ≤ 0.100)are considered. The wave length of all conditions is one ship length andthe results show strong non-linear features, especially for ak = 0.100,where the phenomenon of green water on deck is observed. Thecomparison of added resistance between the presented computationalresults and measurements shows good agreements. All computationsare performed by our solver naoe-Foam-SJTU developed under theframework of the open source code, OpenFOAM.