Show simple item record

dc.contributor.authorTian, Yuan Si
dc.contributor.authorLi, Erqiang
dc.contributor.authorElsaadawy, Ehab
dc.contributor.authorZhang, Jiaming
dc.contributor.authorVakarelski, Ivan Uriev
dc.contributor.authorThoroddsen, Sigurdur T
dc.date.accessioned2022-01-18T11:24:25Z
dc.date.available2022-01-18T11:24:25Z
dc.date.issued2021-12-20
dc.date.submitted2019-04-04
dc.identifier.citationTian, Y. S., Li, E. Q., Elsaadawy, E., Zhang, J. M., Vakarelski, I. U., & Thoroddsen, S. T. (2022). Coalescence time of water-in-oil emulsions under shear. Chemical Engineering Science, 250, 117257. doi:10.1016/j.ces.2021.117257
dc.identifier.issn0009-2509
dc.identifier.doi10.1016/j.ces.2021.117257
dc.identifier.urihttp://hdl.handle.net/10754/675021
dc.description.abstractHere we use microfluidic techniques to study the coalescence dynamics of water-in-oil emulsions in a simple shear flow. Single water-in-oil emulsion droplets are produced in a glass-capillary-based emulsion generator under Rayleigh-Plateau instability. This droplet is guided into a collision channel, inside which it shears past a stationary water droplet held by surface tension at a nozzle protruding through the wall. Two high-speed cameras with perpendicular views track the droplet interactions. Over 2,000 trajectories were recorded to investigate the interaction time needed for coalescence of the two drops. We study the dependence of this coalescence time tc on droplet approach velocity V, effective diameter DH, offset Δx and continuous-phase viscosity. We find that tc∼V-1, indicating strong correlation between coalescence time and V in our 3-D system, in contrast to results reported from two-dimensional micro-fluidic collision channels. Finally, the experimental results reveal scaling law for dimensionless time needed for coalescence as tc∼DHΔx-0.5V-1, when the channel confinement effects are minimal.
dc.description.sponsorshipThe work described herein was funded by Saudi Aramco under grant to KAUST: ORS No. 1958.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0009250921008228
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Chemical Engineering Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering Science, [250, , (2021-12-20)] DOI: 10.1016/j.ces.2021.117257 . © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleCoalescence time of water-in-oil emulsions under shear
dc.typeArticle
dc.contributor.departmentDivision of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalChemical Engineering Science
dc.rights.embargodate2023-12-28
dc.eprint.versionPost-print
dc.contributor.institutionKey Laboratory of Road Construction Technology and Equipment of Ministry of Education, School of Construction Machinery, Chang'an University, Xi'an 710064, China
dc.contributor.institutionDepartment of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China
dc.contributor.institutionResearch and Development Center, Saudi Aramco, Dhahran 31311, Saudi Arabia
dc.identifier.volume250
dc.identifier.pages117257
kaust.personTian, Yuan Si
kaust.personLi, Erqiang
kaust.personZhang, Jiaming
kaust.personVakarelski, Ivan Uriev
kaust.personThoroddsen, Sigurdur T.
dc.date.accepted2021-11-03
dc.identifier.eid2-s2.0-85121990758


This item appears in the following Collection(s)

Show simple item record