Rayleigh-Taylor instability of cylindrical water droplet induced by laser-produced cavitation bubble

doi:10.1017/jfm.2021.401

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Rayleigh-Taylor instability of cylindrical water droplet induced by laser-produced cavitation bubble
	Wang JZ(王静竹)3,4; Li HC(李泓辰)3,4; Guo WL(郭文璐)3,4; Wang Z(王展)2,3,4; Du TZ(杜特专)2,3,4; Wang YW(王一伟)2,3,4; Abe, Akihisa 1; Huang CG(黄晨光)2,3,4
刊名	JOURNAL OF FLUID MECHANICS
	2021-06-03
卷号	919 页码:27
关键词	bubble dynamics cavitation
ISSN号	0022-1120
DOI	10.1017/jfm.2021.401
通讯作者	Wang, Yiwei(wangyw@imech.ac.cn)
英文摘要	This study gives insights into the interfacial instability of water droplets through a combination of laboratory experiments, numerical simulations and analytical modelling. An experiment is conducted in a narrow gap between two plates to model the two-dimensional cylindrical geometry, and a pulsed laser beam is focused inside a water droplet to generate a cavitation bubble. Three distinct characteristics of droplet deformation can be observed: (i) splashing; (ii) ventilating; and (iii) a stable state. In addition, an analytical model considering the Rayleigh-Taylor instability and bubble oscillation is developed based on the assumption that fluid is inviscid and incompressible. The analytical model is solved to obtain a phase diagram describing three distinct phenomena. Two dimensionless parameters, (eta) over cap (ins) and (eta) over cap (sta), are used to determine the boundaries between different regimes. The parameter (eta) over cap (ins) is defined by the ratio of the perturbation amplitude to the difference between the droplet and bubble radii, whereas the other parameter (eta) over cap (sta) is defined by the ratio of the perturbation amplitude to the initial droplet radius. Interfacial instability is induced when the perturbed droplet surface penetrates the bubble boundary, namely, vertical bar(eta) over cap (ins)vertical bar >= 1. Splashing and ventilating phenomena occur for (eta) over cap (ins) >= and (eta) over cap (ins) <= -1, respectively. A stable state occurs when droplet fragmentation does not appear despite small-amplitude perturbations for (eta) over cap (sta) <= 0.1. There is a transition zone between the ventilating and stable state, which is bounded by (eta) over cap (ins) = -1 and (eta) over cap (sta). Finally, the phase diagram is verified by the experimental and numerical results.
分类号	一类/力学重要期刊
WOS关键词	FRAGMENTATION ; VAPORIZATION ; DYNAMICS ; COLLAPSE ; PLASMA ; FLOWS ; MODEL
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:000657453000001
其他责任者	Wang, Yiwei
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/86904]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Kobe Univ, Grad Sch Maritime Sci, Kobe, Hyogo 6580022, Japan 2.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Wang JZ,Li HC,Guo WL,et al. Rayleigh-Taylor instability of cylindrical water droplet induced by laser-produced cavitation bubble[J]. JOURNAL OF FLUID MECHANICS,2021,919:27.
APA	王静竹.,李泓辰.,郭文璐.,王展.,杜特专.,...&黄晨光.(2021).Rayleigh-Taylor instability of cylindrical water droplet induced by laser-produced cavitation bubble.JOURNAL OF FLUID MECHANICS,919,27.
MLA	王静竹,et al."Rayleigh-Taylor instability of cylindrical water droplet induced by laser-produced cavitation bubble".JOURNAL OF FLUID MECHANICS 919(2021):27.