二维多圆柱涡激运动的数值模拟(万德成)

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P(^8Xf^x0二维多圆柱涡激运动数值模拟

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【作者】万德成 【作者单位】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水利论文 C&|k s!E9S

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~l"jv{!Fs6q0【论文摘要】 本研究利用多重网格虚拟边界有限元法(MFBM)数值模拟多圆柱涡激运动问题. MFBM 的最大优点是允许用固定的结构化网格覆盖真实物体形状却又独立于真实运动物体进行数值处理,物体可以在流体计算的固定网格中自由运动而不需要重新生成网格,物体的形状和数量不受限制,因此特别适合多圆柱物体在流场中运动问题的数值模拟.本研究采用 MFBM 方法,对一个大圆柱捆绑四个小圆柱,在黏性流场中的受迫运动和自激运动问题进行数值模拟,并分析比较多圆柱在受迫运动和自激运动的泻涡结构特征与多圆柱运动的关系.

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9Kg+yyy CAG6d0【英文论文摘要】 In this paper,multigrid fictitious boundary method(MFBM)is applied to direct numerical simulation of vortex-induced motions of multi-cylinders in viscous flows.Both flow-induced and forced oscillations are considered.The main advantage of this methodology is that they allow the numerical treatment on a fixed structured mesh on a simple shape auxiliary domain,allowing therefore the use of fast solvers.Numerical examples of a 2D big circular cylinder binding four small circular cylinders in a channel viscous flow are presented to illustrate the efficiency of the presented method for numerical solution of multi-cylinders undergoing vortex-induced motions.水利论文 \f!m|'\/[t"Y

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【论文关键词】 多重网格虚拟边界法; 涡激运动; 多圆柱; 黏性流动
7Y a J@&pB:cr)V&V0【英文论文关键词】 multigrid fictitious boundary method; viscous flows; VIM; truss cylinders水利论文 O {7E.@U\3P
【基金】上海浦江人才计划(No.06PJ14057);; 国家自然科学基金(No.10672101,50739004);; 国家科技部863课题(No.2006AA09Z354,2006AA09A107);; 教育部博士点基金(No.20060248039)的资助水利论文ND*HnY/UD M E

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TAG: 数值模拟 圆柱 运动
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