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Recent Results from Analysis of Flow Structures and Energy Modes Induced by Viscous Wave around a Surface-Piercing Cylinder

机译：穿刺缸周围粘性波引起的流动结构和能量模式分析的最新结果

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摘要

Due to its relevance in ocean engineering, the subject of the flow field generated by water waves around a vertical circular cylinder piercing the free surface has recently started to be considered by several research groups. In particular, we studied this problem starting from the velocity-potential framework, then the implementation of the numerical solution of the Euler equations in their velocity-pressure formulation, and finally the performance of the integration of the Navier-Stokes equations in primitive variables. We also developed and applied methods of extraction of the flow coherent structures and most energetic modes. In this work, we present some new results of our research directed, in particular, toward the clarification of the main nonintuitive character of the phenomenon of interaction between a wave and a surface-piercing cylinder, namely, the fact that the wave exerts its maximum force and exhibits its maximum run-up on the cylindrical obstacle at different instants. The understanding of this phenomenon becomes of crucial importance in the perspective of governing the entity of the wave run-up on the obstacle by means of wave-flow-control techniques.
机译：由于其在海洋工程中的重要性，最近几个研究小组开始考虑由围绕自由表面的垂直圆柱体周围的水波产生的流场问题。特别是，我们从速度势框架开始研究这个问题，然后从欧拉方程的速度-压力公式的数值解决方案的实现开始，最后是在原始变量中对Navier-Stokes方程积分的性能。我们还开发并应用了提取流体相干结构和大多数能量模式的方法。在这项工作中，我们提出了一些新的研究结果，特别是澄清了波浪与表面穿孔圆柱体之间相互作用现象的主要非直观特征，即波浪发挥了最大作用。力，并在不同的时刻在圆柱障碍物上表现出最大加速。从通过波流控制技术控制障碍物上的波上升的实体的角度来看，对该现象的理解至关重要。

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  • 来源
    《Mathematical Problems in Engineering》 |2017年第10期|5875948.1-5875948.10|共10页
  • 作者

    Alfonsi Giancarlo; Lauria Agostino; Primavera Leonardo;

  • 作者单位

    Univ Calabria, Fluid Dynam Lab, Via P Bucci 42b, I-87036 Cosenza, Italy;

    Univ Calabria, Fluid Dynam Lab, Via P Bucci 42b, I-87036 Cosenza, Italy;

    Univ Calabria, Fluid Dynam Lab, Via P Bucci 42b, I-87036 Cosenza, Italy;

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