Drop impact into a deep pool: Vortex shedding and jet formation

Handle URI:
http://hdl.handle.net/10754/575631
Title:
Drop impact into a deep pool: Vortex shedding and jet formation
Authors:
Agbaglah, Gilou; Thoraval, Marie-Jean; Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 ) ; Zhang, Li V.; Fezzaa, Kamel; Deegan, Robert D.
Abstract:
One of the simplest splashing scenarios results from the impact of a single drop on a deep pool. The traditional understanding of this process is that the impact generates an axisymmetric sheet-like jet that later breaks up into secondary droplets. Recently it was shown that even this simplest of scenarios is more complicated than expected because multiple jets can be generated from a single impact event and there are transitions in the multiplicity of jets as the experimental parameters are varied. Here, we use experiments and numerical simulations of a single drop impacting on a deep pool to examine the transition from impacts that produce a single jet to those that produce two jets. Using high-speed X-ray imaging methods we show that vortex separation within the drop leads to the formation of a second jet long after the formation of the ejecta sheet. Using numerical simulations we develop a phase diagram for this transition and show that the capillary number is the most appropriate order parameter for the transition. © 2014 Cambridge University Press.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; High-Speed Fluids Imaging Laboratory
Publisher:
Cambridge University Press (CUP)
Journal:
Journal of Fluid Mechanics
Issue Date:
2-Jan-2015
DOI:
10.1017/jfm.2014.723
Type:
Article
ISSN:
00221120
Sponsors:
The authors thank the James S. McDonnell Foundation for support through a 21st Century Science Initiative in Studying Complex Systems Research Award, S. Weiss and J. Soundar Jerome for valuable discussions, and Claudio Falcon for assistance with the experiments.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorAgbaglah, Gilouen
dc.contributor.authorThoraval, Marie-Jeanen
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.contributor.authorZhang, Li V.en
dc.contributor.authorFezzaa, Kamelen
dc.contributor.authorDeegan, Robert D.en
dc.date.accessioned2015-08-24T08:34:37Zen
dc.date.available2015-08-24T08:34:37Zen
dc.date.issued2015-01-02en
dc.identifier.issn00221120en
dc.identifier.doi10.1017/jfm.2014.723en
dc.identifier.urihttp://hdl.handle.net/10754/575631en
dc.description.abstractOne of the simplest splashing scenarios results from the impact of a single drop on a deep pool. The traditional understanding of this process is that the impact generates an axisymmetric sheet-like jet that later breaks up into secondary droplets. Recently it was shown that even this simplest of scenarios is more complicated than expected because multiple jets can be generated from a single impact event and there are transitions in the multiplicity of jets as the experimental parameters are varied. Here, we use experiments and numerical simulations of a single drop impacting on a deep pool to examine the transition from impacts that produce a single jet to those that produce two jets. Using high-speed X-ray imaging methods we show that vortex separation within the drop leads to the formation of a second jet long after the formation of the ejecta sheet. Using numerical simulations we develop a phase diagram for this transition and show that the capillary number is the most appropriate order parameter for the transition. © 2014 Cambridge University Press.en
dc.description.sponsorshipThe authors thank the James S. McDonnell Foundation for support through a 21st Century Science Initiative in Studying Complex Systems Research Award, S. Weiss and J. Soundar Jerome for valuable discussions, and Claudio Falcon for assistance with the experiments.en
dc.publisherCambridge University Press (CUP)en
dc.subjectbreakup/coalescenceen
dc.subjectdropsen
dc.subjectdrops and bubblesen
dc.titleDrop impact into a deep pool: Vortex shedding and jet formationen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentHigh-Speed Fluids Imaging Laboratoryen
dc.identifier.journalJournal of Fluid Mechanicsen
dc.contributor.institutionDepartment of Physics, Center for the Study of Complex Systems, University of MichiganAnn Arbor, MI, United Statesen
dc.contributor.institutionPhysics of Fluids Group, Faculty of Science and Technology, University of TwenteAE Enschede, Netherlandsen
dc.contributor.institutionX-Ray Science Division, Argonne National LaboratoryArgonne, IL, United Statesen
kaust.authorThoraval, Marie-Jeanen
kaust.authorThoroddsen, Sigurdur T.en
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