三维溃坝波绕方柱剧烈流动的数值模拟  

Numerical simulation of violent flow of 3-D dam-breaking wave around square cylinder

作　　者：曹洪建[1] 万德成[1] 杨驰[1,2] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,海洋工程国家重点实验室,上海200240 [2]Center for Computational Fluid Dynamics,George Mason University,Fairfax,Virginia,USA

出　　处：《水动力学研究与进展（A辑）》2013年第4期414-422,共9页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(11072154;50739004);海洋工程国家重点实验室自主研究课题基金(GKZD010059);上海东方学者人才计划基金(2008007);英国劳氏船级社教育基金(LRET)的资助~~

摘　　要：该文采用自主开发的非定常黏性流动问题求解器naoe-FOAM-SJTU,对三维溃坝波和直立方柱相互作用问题进行数值模拟。求解器naoe-FOAM-SJTU是基于开源代码OpenFOAM的数据结构、工具箱和基本流场求解器,专门面向研究船舶与海洋工程水动力学问题而开发的数值计算程序,它可以模拟三维波与物体相互作用等复杂问题,能够较精确的模拟波浪破碎、翻卷等复杂自由面演化过程。计算结果给出了三维溃坝波的演化过程,包括溃坝波和直立方柱相互作用过程中的波面爬高、破碎及翻卷现象,给出了方柱附近的涡流场;并分析了流体黏性效应的影响,得到了直立方柱受溃坝波拍击作用的水动力时间演化过程图,计算结果与实验数据吻合较好。计算结果表明,采用naoe-FOAM-SJTU求解器可以有效地模拟有复杂波面演化的剧烈流动问题,较准确地预报波浪在结构物上的爬高和拍击力。Numerical simulation of 3D dam-breaking wave flows around a square cylinder by our in-house solver naoe-FOAM-SJTU is presented in this paper. The solver naoe-FOAM-SJTU is an unsteady viscous flow code for dealing with hydrodynamic problems in ship and ocean engineering, and developed based on the open source toolbox OpenFOAM. It can be applied to simulate the complex wave-structures interaction and the complex free surface evolution including the wave breakingand turning over phenomena. This paper presents the 3D complex free surface evolution of dam-breaking wave and the phenomena of wave run-up, wave breaking and turning over during the dam-breaking wave interaction with the square cylinder. The vortices field near the cylinder is presented, and the influence of viscous effect is analyzed. The calculated wave impact force on square cylinder shows good agreement with the data from experiment. The numerical results indicate that the naoe-FOAM-SJTU solver can efficiently simulate the complex free-surface evolution, and accurately predict the wave run-up height and impact force on structures.

关 键 词：溃坝波 剧烈流动 黏性流动 naoe-FOAM-SJTU求解器 OPENFOAM 

分 类 号：U661.1[交通运输工程—船舶及航道工程]