Three-dimensional simulation of ligament formation and breakup caused by external vibration

doi:10.1063/5.0006817

	Three-dimensional simulation of ligament formation and breakup caused by external vibration
	Li YK 1; Zhang M1 ; Wu K(吴坤)2
通讯作者	Wu, Kun(wukun@imech.ac.cn)
发表期刊	PHYSICS OF FLUIDS
	2020-08-01
卷号	32 期号:8 页码:17
ISSN	1070-6631
摘要	Ligament formation followed by breakup is the primary process that controls external vibration-driven liquid atomization. In this paper, single-mode Faraday instabilities with detailed interfacial dynamics are studied via three-dimensional simulations with a validated numerical methodology. The detailed mechanisms of ligament formation and its breakup are illuminated. Colliding flow from adjacent troughs results in a pressure increase at the root of the crest. This nonlinear flow structure produces a local maximum pressure point that liberates the liquid region above it from the bulk liquid layer that synchronously moves with the bottom substrate. The appearance of the maximum pressure point can thus be recognized as the indicator of ligament formation. The freed ligament with capillary waves on its surface continues to grow until successive breakup occurs at its tip, which is driven by the "short-wave mode" breakup mechanism. It is found that the tip contraction dynamics of Faraday-type ligament can be well described by a one-dimensional theoretical model of a low-speed liquid jet under temporally periodic acceleration. Finally, the development behaviors of Faraday-type ligament and liquid jet are compared quantitatively, which reveals the analogy in their breakup dynamics in the tip regions.
DOI	10.1063/5.0006817
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000562829900001
关键词[WOS]	INDUCED DROP ATOMIZATION ; SURFACE-TENSION ; SPRAY CHARACTERIZATION ; CAPILLARY WAVES ; ADAPTIVE SOLVER ; FARADAY WAVES ; PINCH-OFF ; COMBUSTION ; DYNAMICS ; EJECTION
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
资助项目	National Natural Science Foundation of China[51976011] ; LHD Youth Innovation Fund[LHD2019CX02]
项目资助者	National Natural Science Foundation of China ; LHD Youth Innovation Fund
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Wu, Kun
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/84969
专题	高温气体动力学国家重点实验室
作者单位	1.Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li YK,Zhang M,Wu K. Three-dimensional simulation of ligament formation and breakup caused by external vibration[J]. PHYSICS OF FLUIDS,2020,32,8,:17.
APA	Li YK,Zhang M,&吴坤.(2020).Three-dimensional simulation of ligament formation and breakup caused by external vibration.PHYSICS OF FLUIDS,32(8),17.
MLA	Li YK,et al."Three-dimensional simulation of ligament formation and breakup caused by external vibration".PHYSICS OF FLUIDS 32.8(2020):17.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Jp2020289.pdf（14652KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载