Numerical simulations of a toroidal droplet breakup in viscous oils

doi:10.1063/5.0123867

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	Numerical simulations of a toroidal droplet breakup in viscous oils
	Qin, Shiyi 1; Li, Zhaolin 1; Wang, Xun 2; Li K(李凯)3,4 ; Chen, Xue1,5
通讯作者	Chen, Xue([email protected])
发表期刊	AIP ADVANCES
	2022-11-01
卷号	12 期号:11 页码:7
摘要	Toroidal droplets are inherently unstable in viscous oils; they either shrink to a single drop or break into several spherical droplets due to Rayleigh-Plateau instability. In this paper, the breakup dynamics of toroidal droplets in immiscible viscous oils have been numerically investigated. A two-dimensional model combined level-set method is proposed. Numerical results reveal that the initial aspect ratios, interfacial tensions, and outer liquid viscosities play important roles in determining the breakup dynamics of toroidal droplets. The initial aspect ratios dominate the number of split droplets, which is consistent with a linearly scaling law n = 0.57 R-0/a(0). By considering key factors of interfacial tension in this process, it is found that interfacial tension is crucial in the initial morphology of the toroidal droplet and helps to retard the unstable breakup dynamics. Interestingly, reducing the interfacial tension stabilizes it against breakup. We further study the effect of viscosity on the breakup dynamics. The surrounding viscous oils contribute to stabilizing the interfacial-tension-driven instabilities and extending the breakup time. Thus, for a toroidal droplet in high viscosity oils and a sufficiently low interfacial tension system, the unstable breakup dynamics could be delayed. Our findings provide a novel fundamental understanding of toroidal droplets and are beneficial to applications involving the manipulation of toroidal droplets. (C) 2022 Author(s).
DOI	10.1063/5.0123867
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000883736100006
关键词[WOS]	LIQUID ; RING
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
资助项目	National Natural Science Foundation of China ; Guangxi Science and Technology Project ; Young Elite Scientists Sponsorship Program by CAST ; Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology ; [12162011] ; [ZY20198017] ; [2021QNRC001] ; [22-35-4-S011]
项目资助者	National Natural Science Foundation of China ; Guangxi Science and Technology Project ; Young Elite Scientists Sponsorship Program by CAST ; Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology
论文分区	Q3
力学所作者排名	1
RpAuthor	Chen, Xue
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/90787
专题	微重力重点实验室
作者单位	1.Guilin Univ Elect Technol, Sch Mech & Elect Engn, Guilin 541004, Peoples R China; 2.Beihang Univ, Sch Reliabil & Syst Engn, Xueyuan Rd 37, Beijing 100083, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100190, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100149, Peoples R China; 5.Guilin Univ Elect Technol, Guangxi Key Lab Mfg Syst & Adv Mfg Technol, Guilin 541004, Peoples R China
推荐引用方式 GB/T 7714	Qin, Shiyi,Li, Zhaolin,Wang, Xun,et al. Numerical simulations of a toroidal droplet breakup in viscous oils[J]. AIP ADVANCES,2022,12,11,:7.Rp_Au:Chen, Xue
APA	Qin, Shiyi,Li, Zhaolin,Wang, Xun,李凯,&Chen, Xue.(2022).Numerical simulations of a toroidal droplet breakup in viscous oils.AIP ADVANCES,12(11),7.
MLA	Qin, Shiyi,et al."Numerical simulations of a toroidal droplet breakup in viscous oils".AIP ADVANCES 12.11(2022):7.

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