Numerical simulation of wave interacting with a free rolling body
Numerical simulation of wave interacting with a free rolling body
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DOI：
10.2478/ijnaoe-2013-0137
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发表时间：
2013-09
影响因子：
6
通讯作者：
J. Jung;H. Yoon;H. Chun;Inwon Lee;Hyun Park
中科院分区：
文献类型：
--
作者：
J. Jung;H. Yoon;H. Chun;Inwon Lee;Hyun Park
摘要本文对规则波与矩形浮体横摇运动的相互作用进行了数值模拟。为了模拟矩形浮动结构数值波浪水池内的二维不可压缩粘性两相流动，本文采用了基于有限体积法的流体体积法。采用滑移网格技术处理矩形浮体在流固耦合作用下的运动。通过考虑三个不同的波浪周期，研究了波浪周期对结构的流动、横摇运动和作用力的影响。矩形结构的波高和横摇运动随时间的变化规律与试验结果在所有波浪周期内都是一致的。本文的响应振幅算符与线性势理论的实验结果符合得很好。本文的数值结果有效地反映了实验结果所描述的旋涡产生和演化的全过程。与波浪周期较短的情况相比，较长的波浪周期显示出结构每个底角附近的涡旋演化机制不同。此外，还对结构的x向和z向作用力进行了分析。
ABSTRACT The present study numerically models the interaction between a regular wave and the roll motion of a rectangular floating structure. In order to simulate two-dimensional incompressible viscous two-phase flow in a numerical wave tank with the rectangular floating structure, the present study used the volume of fluid method based on the finite volume method. The sliding mesh technique is adopted to handle the motion of the rectangular floating structure induced by fluid-structure interaction. The effect of the wave period on the flow, roll motion and forces acting on the structure is examined by considering three different wave periods. The time variations of the wave height and the roll motion of the rectangular structure are in good agreement with experimental results for all wave periods. The present response amplitude operator is in good agreement with experimental results with the linear potential theory. The present numerical results effectively represent the entire process of vortex generation and evolution described by the experimental results. The longer wave period showed a different mechanism of the vortex evolution near each bottom corner of the structure compared to cases of shorter wave periods. In addition, the x-directional and z-directional forces acting on the structure are analyzed.