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dc.contributor.authorThoroddsen, Sigurdur T
dc.contributor.authorTakehara, Kohsei
dc.contributor.authorEtoh, Takeharugoji
dc.date.accessioned2015-08-03T09:57:45Z
dc.date.available2015-08-03T09:57:45Z
dc.date.issued2012-07-18
dc.identifier.issn00221120
dc.identifier.doi10.1017/jfm.2012.281
dc.identifier.urihttp://hdl.handle.net/10754/562243
dc.description.abstractWe use ultra-high-speed video imaging to observe directly the earliest onset of prompt splashing when a drop impacts onto a smooth solid surface. We capture the start of the ejecta sheet travelling along the solid substrate and show how it breaks up immediately upon emergence from the underneath the drop. The resulting micro-droplets are much smaller and faster than previously reported and may have gone unobserved owing to their very small size and rapid ejection velocities, which approach 100 m s-1, for typical impact conditions of large rain drops. We propose a phenomenological mechanism which predicts the velocity and size distribution of the resulting microdroplets. We also observe azimuthal undulations which may help promote the earliest breakup of the ejecta. This instability occurs in the cusp in the free surface where the drop surface meets the radially ejected liquid sheet. © 2012 Cambridge University Press.
dc.description.sponsorshipS.T.T. was partially supported by KAUST GCR AEA Grant 70000000028 (Fine-Resolution Printing).
dc.publisherCambridge University Press (CUP)
dc.subjectaerosols/atomization
dc.subjectbreakup/coalescence
dc.subjectdrops
dc.titleMicro-splashing by drop impacts
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentHigh-Speed Fluids Imaging Laboratory
dc.identifier.journalJournal of Fluid Mechanics
dc.contributor.institutionDepartment of Civil and Environmental Engineering, Kinki University, Higashi-Osaka 577-8502, Japan
kaust.personThoroddsen, Sigurdur T


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