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论文类型：会议论文

发表时间：2019-06-16

收录刊物：EI

卷号：3

页面范围：2772-2778

摘要：In this paper, two-dimensional numerical simulations of evolution of breaking waves are investigated using the open source code Basilisk, which solved Navier-Stokes equations with a geometry volume of fluid method to capture free surfaces. In the present simulations, dispersive focusing wave groups are generated. The main concerns are focused on the wave amplitude evolution, distribution of instantaneous phases of the wave components at the wave crest and evolution of time-frequency waves energy for the focused waves along the direction of wave propagating, through three different wave steepness cases from non-breaking waves to breaking waves. It is found that several rollers (including clockwise rollers and counterclockwise rollers) are generated during the process of wave breaking, and the counterclockwise roller is usually generated between two successive clockwise rollers. The energy density of the wave components of frequencies at the peak frequency doesn��t significantly gain or lose energy, even for the breaking waves situation. ? 2019 by the International Society of Offshore and Polar Engineers (ISOPE).