Numerical simulations of a toroidal droplet breakup in viscous oils

doi:10.1063/5.0123867

	Numerical simulations of a toroidal droplet breakup in viscous oils
	Qin, Shiyi 5; Li, Zhaolin 5; Wang, Xun 4; Li K(李凯)2,3; Chen, Xue 1,5
刊名	AIP ADVANCES
	2022-11-01
卷号	12 期号:11 页码:7
DOI	10.1063/5.0123867
通讯作者	Chen, Xue(chenxue@guet.edu.cn)
英文摘要	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).
分类号	Q3
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]
WOS关键词	LIQUID ; RING
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:000883736100006
资助机构	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
其他责任者	Chen, Xue
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90786]
专题	力学研究所_国家微重力实验室
作者单位	1.Guilin Univ Elect Technol, Guangxi Key Lab Mfg Syst & Adv Mfg Technol, Guilin 541004, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100149, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100190, Peoples R China; 4.Beihang Univ, Sch Reliabil & Syst Engn, Xueyuan Rd 37, Beijing 100083, Peoples R China; 5.Guilin Univ Elect Technol, Sch Mech & Elect Engn, 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.
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.