Numerical simulations of three-dimensional plunging breaking waves: generation and evolution of aerated vortex filaments
Numerical simulations of three-dimensional plunging breaking waves: generation and evolution of aerated vortex filaments
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DOI：
10.1017/jfm.2015.62
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发表时间：
2015-02
影响因子：
3.7
通讯作者：
Pierre Lubin;S. Glockner
中科院分区：
文献类型：
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作者：
Pierre Lubin;S. Glockner
摘要本文的工作范围是介绍和讨论在空气和水中通过求解Navier-Stokes方程模拟三维倾翻破碎波所得到的结果。计算能力的最新进展使我们能够进行精细的三维模拟，使我们有机会首次研究波浪破碎现象早期阶段产生的细涡丝。到目前为止，还没有在实验室中进行实验性观察，这些结构只在罕见的纪录片中可见（例如BBC 2009年南太平洋。在YouTube上，7 BOhDaJH 0 m4）。这些精细的相干结构是三维流向涡管，像涡丝，连接飞溅和空气的主管，在主流方向上伸长。本文的第一部分是专门介绍的模型和数值方法。然后仔细描述了波浪破碎时发生的空气夹带。由于网格的高分辨率，这些精细的细长结构被模拟和解释。
Abstract The scope of this work is to present and discuss the results obtained from simulating three-dimensional plunging breaking waves by solving the Navier–Stokes equations, in air and water. Recent progress in computational capabilities has allowed us to run fine three-dimensional simulations, giving us the opportunity to study for the first time fine vortex filaments generated during the early stage of the wave breaking phenomenon. To date, no experimental observations have been made in laboratories, and these structures have only been visualised in rare documentary footage (e.g. BBC 2009 South Pacific. Available on YouTube, 7BOhDaJH0m4). These fine coherent structures are three-dimensional streamwise vortical tubes, like vortex filaments, connecting the splash-up and the main tube of air, elongated in the main flow direction. The first part of the paper is devoted to the presentation of the model and numerical methods. The air entrainment occurring when waves break is then carefully described. Thanks to the high resolution of the grid, these fine elongated structures are simulated and explained.