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The effect of surfactant on the motion of a buoyancy-driven drop at intermediate Reynolds numbers: A numerical approach
Alternative TitleJ. Colloid Interface Sci.
Li, XJ; Mao, ZS
2001-08-01
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume240Issue:1Pages:307-322
AbstractA numerical investigation of the flow field inside and around a deformed drop translating in another quiescent liquid contaminated by surfactant soluble in continuous phase but not soluble in dispersed phase is presented in this paper. The finite difference method was used to solve numerically the coupled Navier-Stokes and convective-diffusion equations in a body-fitted orthogonal coordinate system. The present numerical simulation of a two-fluid free-boundary problem was validated by comparison of the simulation results of a drop contaminated by surfactant at creeping flow with the analytical solution and the predicted rise velocity of a bubble contaminated by SDS with experimental data at the moderate Reynolds number. To evaluate the effect of surfactant on the drag coefficient, the steady motion of a drop of the same volume in the pure and contaminated systems was simulated. The behavior of the recirculating wake behind a contaminated drop was also examined and found that it becomes more closely attached to the rear stagnancy of the drop when the surfactant concentration is increase gradually. Finally, the stagnant-cap model was revisited and its defects and limitations were analyzed against numerical simulation. (C) 2001 Academic Press.; A numerical investigation of the flow field inside and around a deformed drop translating in another quiescent liquid contaminated by surfactant soluble in continuous phase but not soluble in dispersed phase is presented in this paper. The finite difference method was used to solve numerically the coupled Navier-Stokes and convective-diffusion equations in a body-fitted orthogonal coordinate system. The present numerical simulation of a two-fluid free-boundary problem was validated by comparison of the simulation results of a drop contaminated by surfactant at creeping flow with the analytical solution and the predicted rise velocity of a bubble contaminated by SDS with experimental data at the moderate Reynolds number. To evaluate the effect of surfactant on the drag coefficient, the steady motion of a drop of the same volume in the pure and contaminated systems was simulated. The behavior of the recirculating wake behind a contaminated drop was also examined and found that it becomes more closely attached to the rear stagnancy of the drop when the surfactant concentration is increase gradually. Finally, the stagnant-cap model was revisited and its defects and limitations were analyzed against numerical simulation. (C) 2001 Academic Press.
KeywordSurfactant Mass Transfer Single Drop Drop Motion Stagnant Cap Model Interfacial Adsorption Numerical Simulation
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1006/jcis.2001.7587
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSPHERICAL BUBBLE ; FLOW PAST ; RETARDATION ; BEHAVIOR ; FILMS
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000170111900036
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5739
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Chem Met, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Li, XJ,Mao, ZS. The effect of surfactant on the motion of a buoyancy-driven drop at intermediate Reynolds numbers: A numerical approach[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2001,240(1):307-322.
APA Li, XJ,&Mao, ZS.(2001).The effect of surfactant on the motion of a buoyancy-driven drop at intermediate Reynolds numbers: A numerical approach.JOURNAL OF COLLOID AND INTERFACE SCIENCE,240(1),307-322.
MLA Li, XJ,et al."The effect of surfactant on the motion of a buoyancy-driven drop at intermediate Reynolds numbers: A numerical approach".JOURNAL OF COLLOID AND INTERFACE SCIENCE 240.1(2001):307-322.
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