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Regime mapping of multiple breakup of droplets in shear flow by phase-field lattice Boltzmann simulation

文献类型：期刊论文

作者Zhang, Jingchang1,2; Shu, Shuli1; Guan, Xiaoping1; Yang, Ning1,2
刊名CHEMICAL ENGINEERING SCIENCE
出版日期2021-08-31
卷号240页码:13
关键词Droplet breakup Shear flow Phase-field model Lattice Boltzmann method Surfactant
ISSN号0009-2509
DOI10.1016/j.ces.2021.116673
英文摘要Multiple breakup refers to a sequence of events through which a single droplet eventually produces multiple daughter droplets in a shear flow. It is a more common phenomenon than binary breakup. Using a phase-field lattice Boltzmann method, this work investigates the effects of Reynolds number, capillary number and soluble surfactant on multiple breakup in shear flow. We find that the regime map for a droplet in a surfactant-free shear flow can be segmented into the non-breakup, elementary breakup, multiple breakup, filament and coalescence regimes. By contrast, the multiple-breakup regime widens and the coalescence regime narrows in the system of surfactant. This difference on macroscale regimes originates from the mesoscale behaviour caused by the interaction of surfactant and shear flow. While surfactant hinders droplet breakup at lower Re, it promotes breakup at higher Re. The interfaces around the breaking points are stretched by the opposite reaction of Marangoni stress. While the regime map gives the number of daughter droplets in a given shear flow, a correlation is proposed to calculate the composition of breakup events, viz. the number of binary breakup and of ternary breakup events. (c) 2021 Elsevier Ltd. All rights reserved.
WOS关键词NUMERICAL-SIMULATION ; FLUID ; DEFORMATION ; EMULSIONS ; VISCOSITY ; DYNAMICS ; DROPS ; MODEL ; SURFACTANT ; BEHAVIOR
资助项目National Key Research and Development Program of China[2017YFE0106500] ; National Natural Science Foundation of China[21925805] ; National Natural Science Foundation of China[91834303] ; National Natural Science Foundation of China[21808222] ; Strategic Priority Research Program[XDA21030700] ; Chinese Academy of Sciences
WOS研究方向Engineering
语种英语
WOS记录号WOS:000656201400001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program ; Chinese Academy of Sciences
源URL[http://ir.ipe.ac.cn/handle/122111/48954]  
专题中国科学院过程工程研究所
通讯作者Yang, Ning
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Jingchang,Shu, Shuli,Guan, Xiaoping,et al. Regime mapping of multiple breakup of droplets in shear flow by phase-field lattice Boltzmann simulation[J]. CHEMICAL ENGINEERING SCIENCE,2021,240:13.
APA Zhang, Jingchang,Shu, Shuli,Guan, Xiaoping,&Yang, Ning.(2021).Regime mapping of multiple breakup of droplets in shear flow by phase-field lattice Boltzmann simulation.CHEMICAL ENGINEERING SCIENCE,240,13.
MLA Zhang, Jingchang,et al."Regime mapping of multiple breakup of droplets in shear flow by phase-field lattice Boltzmann simulation".CHEMICAL ENGINEERING SCIENCE 240(2021):13.

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来源：过程工程研究所

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