分层流体中内孤立波数值造波方法及其应用  

Numerical Method of Solitary Wave Generation in a Stratified Flow and its Applications

作　　者：关晖[1] 苏晓冰[1] 田俊杰[1] 

机构地区：[1]解放军理工大学理学院数理系,南京211101

出　　处：《力学季刊》2011年第2期218-224,共7页Chinese Quarterly of Mechanics

基　　金：武器装备预先研究项目(407010703);国家自然科学基金项目(11072267)

摘　　要：海洋内波是发生在密度分层海水中的波动,对潜艇航行的稳定性和悬停性都有重要影响。本文采用有限体积自适应半结构多重网格法求解Navier-Stokes方程,并用VOF(Volume of Fluid)方法追踪两层流体界面,应用双推板造波法进行内孤立波数值造波,对两层流体中的内孤立波数值造波方法进行研究和探讨。数值模拟结果证实了该数值水槽数值造波的有效性和可靠性,并将潜艇放入数值水槽中,研究内孤立波流场演化的过程,为后续研究潜艇的水动力学特性打下了基础。The internal waves exist in the density stratified sea water,and have important effects to the stability and hovering ability of the motion of submarines.Using the finite volume algorithm with adaptive semi-structure grids,the multi-grid method and the volume of fluid method to solve Navier-Stokes equations,a numerical internal solitary wave flume,based on the idea of pushing two plates in opposite directions in the tank,with the ability of wave generation was developed,and the validity for such a method was numerically confirmed.The results were compared well with the analytical solution of KdV equation.The evolution of internal solitary waves was carried out,which laid a solid foundation for the future study of the interactions between internal solitary waves and submarines.

关 键 词：内孤立波 潜艇 数值水槽 有限体积自适应半结构多重网格法 

分 类 号：TV139.2[水利工程—水力学及河流动力学]