三维波浪作用下大直径圆柱绕流的数值模拟  

Numerical Simulation for Diffraction around Large-Diameter Circular Cylinder Subjected to Three-Dimension Wave

作　　者：祝兵[1] 宋随弟[1] 谭长建[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]上海建筑科学研究院上海市工程结构新技术重点实验室,上海200032

出　　处：《西南交通大学学报》2012年第2期224-229,共6页Journal of Southwest Jiaotong University

基　　金：铁道部科技研究开发计划资助项目(2010G004-L);中央高校基本科研业务费专项资金资助项目(2010ZT01)

摘　　要：为探讨三维波浪与结构物的相互作用,以两相流概念、大涡模拟的不可压缩粘性流体运动方程和自由水面追踪分段线性近似的流体体积(VOF)法为基础,建立了三维波浪与结构物相互作用的数学模型;对三维波浪作用下大直径圆柱绕流进行了数值模拟,用两步边界定位法和虚拟边界力法确定波浪与结构物接触面.结果表明:大直径圆柱绕流系数的数值计算结果与理论解吻合,所建立的数学模型能够很好地模拟三维波浪与结构物的相互作用.In order to research interaction between three-dimensional waves and structures,a numerical model for the interaction of three-dimensional waves and a structure was established based on the concept of two-phase flow,the volume of fluid（VOF） method and incompressible viscous fluid equations in large eddy simulation（LES）.Interaction between three-dimensional waves and a large-diameter circular cylinder was simulated numerically.The virtual boundary force method（VBFM） and two-step boundary-pinpoint method were adopted to determine the boundaries of the structure.The research show that the numerical simulation result of the circumfluence factor for a large-diameter circular cylinder has a good agreement with the analytical solution.The established numerical model can successfully simulate the interaction between three-dimensional waves and structures.

关 键 词：三维波浪与结构物相互作用 流体体积(VOF)法 大涡模拟 两步边界定位法 虚拟边界力法 

分 类 号：O357.1[理学—流体力学]