Numerical Study on the Breaking Bow Wave of High-speed KCS Model based on Smoothed Particle Hydrodynamics Method

Wave breaking at the bow of a high-speed ship is of great importance to the hydrodynamic performance of high-speed ships, accompanied by complex flow field deformation. In this study, the smoothed particle hydrodynamics (SPH) method under the Lagrange framework is adopted to simulate the breaking bow wave of the KCS ship model. In order to improve the computational efficiency, the inflow and outflow boundary model is used to establish a numerical tank of current, and a numerical treatment for free surface separation is implemented. Numerical simulations are carried out at Fr = 0.35, 0.40, 0.5, 0.6, and different types of wave breaking such as spilling breaker, plunging breaker, and scars are captured by the SPH method, which is consistent with the experimental result, demonstrating that the present SPH method can be robust and reliable in accurately predicting the breaking bow wave phenomenon of high-speed ships. Furthermore, the wave elevation and velocity field in the bow wave region are analyzed, and the evolution of the bow wave breaking is provided.