Experimental investigation of freely falling thin disks. Part 2.   Transition of three-dimensional motion from zigzag to spiral

doi:10.1017/jfm.2013.390

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	Experimental investigation of freely falling thin disks. Part 2. Transition of three-dimensional motion from zigzag to spiral
	Lee, Cunbiao ; Su, Zhuang ; Zhong, Hongjie ; Chen, Shiyi ; Zhou, Mingde ; Wu, Jiezhi
刊名	journal of fluid mechanics
	2013
关键词	aerodynamics flow-structure interactions AXISYMMETRICAL BODIES DYNAMICS BUBBLES WAKES BODY
DOI	10.1017/jfm.2013.390
英文摘要	The free-fall motion of a thin disk with small dimensionless moments of inertia (I* < 10(-3)) was investigated experimentally. The transition from two-dimensional zigzag motion to three-dimensional spiral motion occurs due to the growth of three-dimensional disturbances. Oscillations in the direction normal to the zigzag plane increase with the development of this instability. At the same time, the oscillation of the nutation angle decreases to zero and the angle remains constant. The effects of initial conditions (release angle) were investigated. Two kinds of transition modes, zigzag-spiral transition and zigzag-spiral-zigzag intermittence transition, were observed to be separated by a critical Reynolds number. In addition, the solution of the generalized Kirchhoff equations shows that the small I* is responsible for the growth of disturbances in the third dimension (perpendicular to the planar motion).; Mechanics; Physics, Fluids & Plasmas; SCI(E); EI; 1; ARTICLE; 77-104; 732
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/315849]
专题	工学院
推荐引用方式 GB/T 7714	Lee, Cunbiao,Su, Zhuang,Zhong, Hongjie,et al. Experimental investigation of freely falling thin disks. Part 2. Transition of three-dimensional motion from zigzag to spiral[J]. journal of fluid mechanics,2013.
APA	Lee, Cunbiao,Su, Zhuang,Zhong, Hongjie,Chen, Shiyi,Zhou, Mingde,&Wu, Jiezhi.(2013).Experimental investigation of freely falling thin disks. Part 2. Transition of three-dimensional motion from zigzag to spiral.journal of fluid mechanics.
MLA	Lee, Cunbiao,et al."Experimental investigation of freely falling thin disks. Part 2. Transition of three-dimensional motion from zigzag to spiral".journal of fluid mechanics (2013).