Micro-bubble morphologies following drop impacts onto a pool surface

Handle URI:
http://hdl.handle.net/10754/334638
Title:
Micro-bubble morphologies following drop impacts onto a pool surface
Authors:
Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 ) ; Thoraval, M.-J.; Takehara, K.; Etoh, T.G.
Abstract:
When 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.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division
Citation:
Thoroddsen 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.
Publisher:
Cambridge University Press (CUP)
Journal:
Journal of Fluid Mechanics
Issue Date:
Oct-2012
DOI:
10.1017/jfm.2012.319
Type:
Article
ISSN:
00221120
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.contributor.authorThoraval, M.-J.en
dc.contributor.authorTakehara, K.en
dc.contributor.authorEtoh, T.G.en
dc.date.accessioned2014-11-11T14:33:12Z-
dc.date.available2014-11-11T14:33:12Z-
dc.date.issued2012-10en
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.en
dc.identifier.issn00221120en
dc.identifier.doi10.1017/jfm.2012.319en
dc.identifier.urihttp://hdl.handle.net/10754/334638en
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.en
dc.language.isoenen
dc.publisherCambridge University Press (CUP)en
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/2.5/en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/2.5/en
dc.subjectbreakup/coalescenceen
dc.subjectdropsen
dc.subjectthin filmsen
dc.subjectAir filmsen
dc.subjectAir layersen
dc.subjectDirect contacten
dc.subjectDrop Impacten
dc.subjectLow velocitiesen
dc.subjectMicro-bubbleen
dc.subjectMicrobubblesen
dc.subjectUltra high speeden
dc.subjectViscous liquidsen
dc.subjectAiren
dc.subjectLakesen
dc.subjectThin filmsen
dc.subjectDropsen
dc.subjectbubbleen
dc.subjectcapillarityen
dc.subjectcoalescenceen
dc.subjectfluid mechanicsen
dc.subjectmorphologyen
dc.subjectspatial distributionen
dc.subjectsurface areaen
dc.subjectviscous flowen
dc.titleMicro-bubble morphologies following drop impacts onto a pool surfaceen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Fluid Mechanicsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Civil and Environmental Engineering, Kinki University, Higashi-Osaka 577-8502, Japanen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorThoroddsen, Sigurdur T.en
kaust.authorThoraval, Marie-Jeanen
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