Hydrodynamic and Wave Performance around a Ship Hull on the Free Surface under Stokes Waves

摘要

A 3-D model for hydrodynamic performance and Stokes wavespropagation on the free surface is established using the Navier–Stokesequations and Stokes wave theory. The realizable k  turbulencemodel has been implemented to capture turbulent flow around the shiphull. The tracking of the interface between the air and water isaccomplished by the method of VOF(Volume Of Fraction). The motionof the ship hull is simulated using 6 degrees of freedom(6 DOF).Because the heave and pitch is the most attractive parameter, both ofthem are addressed specially considering the calculating cost andefficiency. Simulated water surface profile and Z-velocity distributionagree well with the theoretical value, indicating that this model has agreat ability in simulating wave–current-structure interaction. Thepropagation of Stokes wave traveling with a ship hull is alsonumerically investigated by this model. Then the character of the phasefraction of the free surface and the flow profiles are studied. Theinterface between the water and air on the ship hull’s boundary is alsocompared with the original surface under the wave’s action.