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dc.contributor.authorVakarelski, Ivan Uriev
dc.contributor.authorYang, Fan
dc.contributor.authorThoroddsen, Sigurdur T
dc.date.accessioned2020-05-13T08:17:58Z
dc.date.available2020-05-13T08:17:58Z
dc.date.issued2020-05-07
dc.identifier.citationVakarelski, I. U., Yang, F., & Thoroddsen, S. T. (2020). Free-rising bubbles bounce stronger from mobile than immobile water-air interfaces. Langmuir. doi:10.1021/acs.langmuir.0c00668
dc.identifier.issn0743-7463
dc.identifier.issn1520-5827
dc.identifier.doi10.1021/acs.langmuir.0c00668
dc.identifier.urihttp://hdl.handle.net/10754/662820
dc.description.abstractRecently it was reported that interface mobility of bubbles and emulsion droplets can have a dramatic effect not only on the characteristic coalescence times, but also on the way bubbles and droplets bounce back after collision [Sci. Adv. 2019, 5, eaaw4292]. Experiments with free-rising bubbles in a pure perfluorocarbon liquid showed that collisions involving mobile interfaces result in stronger series of rebounds before the eventual rapid coalescence. Here we examine this effect for the case of pure water. We compare the bounce of millimeter-size free-rising bubbles from a pure water-air interface with the bounce from a water-air interface on which a Langmuir monolayer of arachidic acid molecules has been deposited. The Langmuir monolayer surface concentration is kept low enough not to affect the water surface tension, but at the same time it is high enough to fully immobilize the interface due to Marangoni stress effects. Bubbles were found to bounce much stronger (up to a factor of 1.8 increase in the rebounding distance) from the clean water interface compared to the water interface with the Langmuir monolayer. These experiments confirm that mobile surfaces enhance bouncing and at the same time demonstrate that the pure water-air interfaces behave as a mobile fluid interfaces in our system. A complimentary finding in our study is that ethanol-air interface behaves as a robust mobile liquid interface. The experimental findings are supported by numerical simulations of the bubble bouncing from both mobile and immobile fluid interfaces.
dc.description.sponsorshipWe acknowledge the use of the Gerris solver in our investigation. The experimental and computational work was supported by the King Abdullah University of Science and Technology (KAUST) under grant URF/1/3723-01-01.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acs.langmuir.0c00668
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.langmuir.0c00668.
dc.titleFree-rising bubbles bounce stronger from mobile than immobile water-air interfaces
dc.typeArticle
dc.contributor.departmentHigh-Speed Fluids Imaging Laboratory
dc.contributor.departmentMechanical Engineering
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalLangmuir
dc.rights.embargodate2021-05-08
dc.eprint.versionPost-print
kaust.personVakarelski, Ivan Uriev
kaust.personYang, Fan
kaust.personThoroddsen, Sigurdur T.
refterms.dateFOA2020-05-13T08:18:55Z
dc.date.published-online2020-05-07
dc.date.published-print2020-06-02


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