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Regime mapping of multiple breakup of droplets in shear flow by phase-field lattice Boltzmann simulation
Zhang, Jingchang1,2; Shu, Shuli1; Guan, Xiaoping1; Yang, Ning1,2
2021-08-31
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume240Pages:13
AbstractMultiple 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.
KeywordDroplet breakup Shear flow Phase-field model Lattice Boltzmann method Surfactant
DOI10.1016/j.ces.2021.116673
Language英语
WOS KeywordNUMERICAL-SIMULATION ; FLUID ; DEFORMATION ; EMULSIONS ; VISCOSITY ; DYNAMICS ; DROPS ; MODEL ; SURFACTANT ; BEHAVIOR
Funding ProjectNational 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 Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program ; Chinese Academy of Sciences
WOS IDWOS:000656201400001
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48955
Collection中国科学院过程工程研究所
Corresponding AuthorYang, Ning
Affiliation1.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
Recommended Citation
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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