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dc.contributor.authorMarston, Jeremy
dc.contributor.authorVakarelski, Ivan Uriev
dc.contributor.authorThoroddsen, Sigurdur T
dc.date.accessioned2015-08-03T09:46:32Z
dc.date.available2015-08-03T09:46:32Z
dc.date.issued2012-05-09
dc.identifier.citationMarston, J. O., Vakarelski, I. U., & Thoroddsen, S. T. (2012). Cavity formation by the impact of Leidenfrost spheres. Journal of Fluid Mechanics, 699, 465–488. doi:10.1017/jfm.2012.124
dc.identifier.issn00221120
dc.identifier.doi10.1017/jfm.2012.124
dc.identifier.urihttp://hdl.handle.net/10754/562175
dc.description.abstractWe report observations of cavity formation and subsequent collapse when a heated sphere impacts onto a liquid pool. When the sphere temperature is much greater than the boiling point of the liquid, we observe an inverted Leidenfrost effect where the sphere is encompassed by a vapour layer that prevents physical contact with the liquid. This creates the ultimate non-wetting scenario during sphere penetration through a free surface, producing very smooth cavity walls. In some cases during initial entry, however, the liquid contacts the sphere at the equator, leading to the formation of a dual cavity structure. For cold sphere impacts, where a contact line is observed, we reveal details of the contact line pinning, which initially forms a sawtooth pattern. We also observe surface waves on the cavity interface for cold spheres. We compare our experimental results to previous studies of cavity dynamics and, in particular, the influence of hydrophobicity on the entry of the sphere. © 2012 Cambridge University Press.
dc.description.sponsorshipThis work was partially supported by KAUST AEA grant 7000000028.
dc.publisherCambridge University Press (CUP)
dc.subjectcavitation
dc.subjectcontact lines
dc.subjecttransition to turbulence
dc.titleCavity formation by the impact of Leidenfrost spheres
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
kaust.personMarston, Jeremy
kaust.personVakarelski, Ivan Uriev
kaust.personThoroddsen, Sigurdur T.
dc.date.published-online2012-05-09
dc.date.published-print2012-05


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