关键词: VOF方法, 砰击, 限制水域, 流体动力特性, 兴波, 水下压力, 自由表面

Abstract:

In this paper, the restricted water with free surface under the slamming by a big flat-bottom structure freely falling from a certain height is taken as the research object, and the commercial computational fluid dynamics （CFD） software Fluent is used to investigate the 3D hydrodynamic characteristics of the water by solving the Navier-Stokes equations. The investigation is conducted by using the volume of fluid （VOF） method with the factors of restricted boundary conditions being considered. The results indicate that, by the proposed method, the 3D wave-making and underwater pressure field variation of close or open water agitated by the pulsed slamming pressure of a big tiat-bottom structure can be effectively and numerically simulated, and that the method is feasible for analyzing the hydrodynamic phenomenon of restricted water under the slamming by a big flat-bottom structure.

Key words: VOF method, slamming, restricted water, hydrodynamic characteristic, wave-making, underwater pressure, free surface