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dc.contributor.authorThoroddsen, Sigurdur T
dc.contributor.authorThoraval, M.-J.
dc.contributor.authorTakehara, K.
dc.contributor.authorEtoh, T.G.
dc.date.accessioned2014-11-11T14:33:12Z
dc.date.available2014-11-11T14:33:12Z
dc.date.issued2012-08-14
dc.identifier.citationThoroddsen ST, Thoraval M-J, Takehara K, Etoh TG (2012) Micro-bubble morphologies following drop impacts onto a pool surface. J Fluid Mech 708: 469-479. doi:10.1017/jfm.2012.319.
dc.identifier.issn00221120
dc.identifier.doi10.1017/jfm.2012.319
dc.identifier.urihttp://hdl.handle.net/10754/334638
dc.description.abstractWhen a drop impacts at low velocity onto a pool surface, a hemispheric air layer cushions and can delay direct contact. Herein we use ultra-high-speed video to study the rupture of this layer, to explain the resulting variety of observed distribution of bubbles. The size and distribution of micro-bubbles is determined by the number and location of the primary punctures. Isolated holes lead to the formation of bubble necklaces when the edges of two growing holes meet, whereas bubble nets are produced by regular shedding of micro-bubbles from a sawtooth edge instability. For the most viscous liquids the air film contracts more rapidly than the capillary-viscous velocity through repeated spontaneous ruptures of the edge. From the speed of hole opening and the total volume of micro-bubbles we conclude that the air sheet ruptures when its thickness approaches ?100.
dc.language.isoen
dc.publisherCambridge University Press (CUP)
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/2.5/
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/2.5/
dc.subjectbreakup/coalescence
dc.subjectdrops
dc.subjectthin films
dc.subjectAir films
dc.subjectAir layers
dc.subjectDirect contact
dc.subjectDrop Impact
dc.subjectLow velocities
dc.subjectMicro-bubble
dc.subjectMicrobubbles
dc.subjectUltra high speed
dc.subjectViscous liquids
dc.subjectAir
dc.subjectLakes
dc.subjectThin films
dc.subjectDrops
dc.subjectbubble
dc.subjectcapillarity
dc.subjectcoalescence
dc.subjectfluid mechanics
dc.subjectmorphology
dc.subjectspatial distribution
dc.subjectsurface area
dc.subjectviscous flow
dc.titleMicro-bubble morphologies following drop impacts onto a pool surface
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentHigh-Speed Fluids Imaging Laboratory
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Fluid Mechanics
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment of Civil and Environmental Engineering, Kinki University, Higashi-Osaka 577-8502, Japan
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personThoroddsen, Sigurdur T.
kaust.personThoraval, Marie-Jean
refterms.dateFOA2018-06-14T07:18:27Z
dc.date.published-online2012-08-14
dc.date.published-print2012-10


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