| 两层黏性流体中直立圆柱体绕流的三维数值模拟 |
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| 引用本文： | 尹德操,尤云祥,魏岗. 两层黏性流体中直立圆柱体绕流的三维数值模拟[J]. 水动力学研究与进展(A辑), 2008, 23(1): 1-6 |
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| 作者姓名： | 尹德操 尤云祥 魏岗 |
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| 作者单位： | 1. 上海交通大学舰舶海洋与建筑工程学院,上海,200030
2. 上海交通大学舰舶海洋与建筑工程学院,上海,200030;解放军理工大学理学院,南京,211101 |
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| 基金项目： | 国家自然科学基金 , 国家高技术研究发展计划(863计划) , 教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 研究了两层流体中直立贯底圆柱体的三维黏性绕流问题.以不可压缩Navier-Stokes方程为控制方程,应用VOF方法追踪两层流体的内界面,建立了该问题的数值模拟方法.成功地数值模拟了两层流体中圆柱体黏性绕流产生的三维尾涡特征,表明了流体的密度分层效应对直立贯底圆柱体的尾涡特性和阻力系数都是有影响的.在海洋立管涡激振动的研究中,考虑流体的密度分层效应是重要的.
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| 关 键 词： | 两层流体 黏性流 三维漩涡 直立圆柱 黏性流体 圆柱体绕流 三维数值模拟 fluid circular cylinder vertical viscous flow 涡激振动 立管 海洋 影响 阻力系数 特性 分层效应 密度 特征 尾涡 流产 模拟方法 绕流问题 |
| 文章编号： | 1000-4874(2008)-01-0001-06 |
| 修稿时间： | 2007-03-06 |
Three-dimensional numerical simulation of the viscous flow around a vertical circular cylinder in a two-layer fluid |
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| YIN De-cao,YOU Yun-xiang,WEI Gang. Three-dimensional numerical simulation of the viscous flow around a vertical circular cylinder in a two-layer fluid[J]. Chinese Journal of Hydrodynamics, 2008, 23(1): 1-6 |
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| Authors: | YIN De-cao YOU Yun-xiang WEI Gang |
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| Abstract: | The viscous flow around a vertically bottom-mounted circular cylinder in an incompressible two-layer fluid is studied numerically.The Navier-Stokes equations are taken as the governing equations while the VOF method is used to track the interface of the two-layer fluid.A numerical method for the problem was presented.The three-dimensional characteristics of the wake vortex due to the viscous flow around the vertical circular cylinder were simulated.The results were compared with the cases for a single-layer fluid,showing that the density stratification can have relatively large effects on the vortex shedding as well as the drag coefficient of the vertical circular cylinder.Therefore,it is important to consider the effect of the density stratification on the vortex-induced vibration of marine risers. |
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| Keywords: | two-layer fluid viscous flow three-dimensional vortex vertical circular cylinder |
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