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	Semi-empirical prediction of the flow structure behind a longitudinally oscillating cylinder based on surface vorticity analysis
	Xu, S.J. ; Wang, M.H. ; Zhou, Y. ; Tu, J.Y.
	2006
英文摘要	The 2-D incompressible N-S equations in a moving cylindrical coordinate were reduced to a linear boundary vorticity equation on the cylinder surface with the no-slip condition applied. The solution to the reduced vorticity equation unveils that vorticity generated by the cylinder surface comprises of two components: i) unsteady and anti-symmetrical component, dependent of the cylinder oscillation; ii) steady alternating component associated with the natural vortex shedding. The competition of the two components, interactions among cylinder-vortices and vortex-vortex result in the occurrence of the flow modes. In the first-stage work, a semi-empirical prediction of the occurrence of the S-II mode is in agreement with previously reported experimental and numerical data. Further analysis is under way to predict the occurrence of all other flow modes.; EI; 0
语种	英语
内容类型	会议论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/327994]
专题	工学院
推荐引用方式 GB/T 7714	Xu, S.J.,Wang, M.H.,Zhou, Y.,et al. Semi-empirical prediction of the flow structure behind a longitudinally oscillating cylinder based on surface vorticity analysis[C]. 见:.

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