Vortex dislocation in wake-type flow caused by local spanwise nonuniformity

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	Vortex dislocation in wake-type flow caused by local spanwise nonuniformity
	Ling GC(凌国灿); Zhao HL(赵红亮); Niu JY(牛家玉)
会议录名称	Hydrodynamics VI: Theory and Applications: Proceedings of the 6th International Conference on Hydrodynamics, Perth, Western Australia, 24-26 November 2004,p.
	2004-11-22
会议名称	The 6th International Conference on Hydrodynamics 22-24 November 2004 Perth, Western Australia
摘要	DNS of spatiotemporal evolution of a wake-type flow is performed. In the incoming flow, a local spanwise nonuniformity in momentum defect is initially imposed. Results show that the spanwise nonuniformity leads to a series of symmetric twist vortex dislocation in downstream of the flow. Vortex line variations and substantial transition of vorticity from spanwise to the streamwise and vertical directions clearly feature the generation of a vortex dislocation and the real vortex linking in the dislocation. Dynamical process and the mechanism responsible for the vortex dislocation are described.; DNS of spatiotemporal evolution of a wake-type flow is performed. In the incoming flow, a local spanwise nonuniformity in momentum defect is initially imposed. Results show that the spanwise nonuniformity leads to a series of symmetric twist vortex dislocation in downstream of the flow. Vortex line variations and substantial transition of vorticity from spanwise to the streamwise and vertical directions clearly feature the generation of a vortex dislocation and the real vortex linking in the dislocation. Dynamical process and the mechanism responsible for the vortex dislocation are described.
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/13792
专题	力学所知识产出(1956-2008)
通讯作者	Ling GC(凌国灿)
推荐引用方式 GB/T 7714	Ling GC,Zhao HL,Niu JY. Vortex dislocation in wake-type flow caused by local spanwise nonuniformity[C]Hydrodynamics VI: Theory and Applications: Proceedings of the 6th International Conference on Hydrodynamics, Perth, Western Australia, 24-26 November 2004,p.,2004.

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