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Wave breaking on ship bow, shoulder and stern waves is of great importance for the hydrodynamic performance of high-speed surface ships. In the present work, an unsteady VOF based RANS method is used to resolve and investigate wave breaking around a high-speed surface combatant advancing in calm water. High resolution VOF method with artificial compression technique in OpenFOAM is used to accurately resolve ship bow waves as well as induced free surface scars. In order to provide physical understanding of ship breaking waves, simulations over two ship speeds, i.e. Fr=0.35, Fr=0.41, are carried out. The benchmark ship model DTMB 5415 is used for all the simulations and extensive experimental flow data (provided by INSEAN and IIHR) are available to validate the CFD results. All the computations are carried out by in-house CFD solver naoe-FOAM-SJTU. Predicted ship resistance, wave elevations and flow velocities around ship hull are presented and compared with the experimental measurement. Wave breaking on ship bow waves and stern waves are observed. The induced free surface scars are also resolved and its relation with breaking waves is also analyzed. The CFD solution of ship resistance shows good agreement with the experiment. Comparisons of velocity components at cross planes show that the present VOF based RANS method can accurately predict the wake region associated with breaking wave.

 

Breaking wave, naoe-FOAM-SJTU solver, ship hydrodynamics, DTMB 5415