哈尔滨工程大学学报Issue(1)：6-11,6.DOI:10.3969/j.issn.1006-7043.201310010
内孤立波与直立圆柱体相互作用特性数值模拟
Numerical simulation for the interaction characteristics of internal solitary waves with a vertical circular cylinder
摘要
Abstract
In order to investigate the characteristics of loads on the vertical circular cylinder due to internal solitary waves a numerical method is studied. According to the applicability conditions for three types of internal solitary wave theories including KdV, eKdV and MCC, a numerical method based on the Navier⁃Stokes equation in a two⁃layer fluid is presented to simulate the strongly nonlinear interaction of internal solitary waves with a vertical circular cylinder, where the velocity⁃inlet boundary is applied by use of the depth⁃averaged velocities in the upper⁃and low⁃er⁃layer fluids induced by the internal solitary wave. The result showed that the waveform and amplitude of the inter⁃nal solitary wave based on the present numerical method are in good agreement with the experimental and theoretical results. Numerical results for the horizontal and vertical forces, as well as torques on the vertical circular cylinder due to the internal solitary wave are also in good agreement with experimental results. It is shown by a series of cal⁃culations that the horizontal and vertical forces on the vertical circular cylinder can be divided into three compo⁃nents, including the wave and viscous pressure forces due to solitary waves. The friction force can in addition be neglected when the fraction force is a small amount. For the horizontal force, the order of the magnitude between the wave and viscous pressure forces is the same, which means the effect of the fluid viscosity is significant. For the vertical force, the component of the viscous pressure force is a small amount, which indicates that the effect of the fluid viscosity can be neglected.关键词
两层流体/内孤立波/直立圆柱体/载荷特性/数值模拟Key words
two-layer fluid/internal solitary waves/vertical circular cylinder/load characteristics/numerical simulation分类
海洋科学引用本文复制引用
王旭,林忠义,尤云祥..内孤立波与直立圆柱体相互作用特性数值模拟[J].哈尔滨工程大学学报,2015,(1):6-11,6.基金项目
国家自然科学基金资助项目（11372184）；高等学校博士点基金资助项目（20110073130003）． （）
