Unsteady RANSE simulation for ship resistance, heave and pitch in regular head waves

Abstract

This study presents an attempt to perform a viscous numerical simulation for ship advancing in regular head waves. The simulation includes computations for total ship resistance, heave and pitch responses for the bare hull of the US Navy combatant DTMB 5512 ship model. The computations are carried out by making use of the commercial software Fine™/Marine provided by NUMECA, where the discretization in space is based on finite volume method using unstructured grid. The unsteady Reynolds-Averaged Navier-Stokes equation is solved while the turbulence is modelled by making use of k-ω shear stress transport model. The free-surface is solved based on volume of fluid method. Results are obtained for ship resistance coefficient, heave and pitch and compared with experimental results provided in the Gothenburg 2010 Workshop on the Naval Hydrodynamics. The comparison of the computed results showed an encouraging agreement with the measured results. Finally, a special investigation for the added resistance in waves is made by comparing the results obtained in this computation with other results obtained in calm water.