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dc.contributor.authorMarston, Jeremy
dc.contributor.authorSprittles, James E.
dc.contributor.authorZhu, Y.
dc.contributor.authorLi, Erqiang
dc.contributor.authorVakarelski, Ivan Uriev
dc.contributor.authorThoroddsen, Sigurdur T
dc.date.accessioned2015-08-03T11:03:50Z
dc.date.available2015-08-03T11:03:50Z
dc.date.issued2013-05
dc.identifier.issn00325910
dc.identifier.doi10.1016/j.powtec.2013.01.062
dc.identifier.urihttp://hdl.handle.net/10754/562737
dc.description.abstractWe present results from an experimental study of the impact of liquid drops onto powder beds which are pre-wetted with the impacting liquid. Using high-speed video imaging, we study both the dynamics of the initial spreading regime and drainage times once the drop has reached its maximum spread on the surface. During the initial spreading stage, we compare our experimental data to a previously developed model which incorporates imbibition into the spreading dynamics and observe reasonable agreement. We find that the maximum spread is a strong function of the moisture content in the powder bed and that the total time from impact to complete drainage is always shorter than that for dry powder. Our results indicate that there is an optimum moisture content (or saturation) which leads to the fastest penetration. We use simple scaling arguments which also identify an optimum moisture content for fastest penetration, which agrees very well with the experimental result. © 2013 Elsevier B.V.
dc.description.sponsorshipThis publication is based on work supported by Award No. KUK-C1-013-04, made by the King Abdullah University of Science and Technology (KAUST) and by an Academic Excellence Alliance grant No. 7000000028 awarded by the KAUST Office of Competitive Research Funds. We thank the anonymous referees for helpful comments and suggestions that greatly improved this paper.
dc.publisherElsevier BV
dc.subjectDrainage
dc.subjectDrop impact
dc.subjectHigh-speed imaging
dc.subjectMaximum deformation
dc.titleDrop spreading and penetration into pre-wetted powders
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.journalPowder Technology
dc.contributor.institutionMathematical Institute, University of Oxford, 24-29 St Giles, Oxford, OX1 3LB, United Kingdom
kaust.personMarston, Jeremy
kaust.personLi, Erqiang
kaust.personVakarelski, Ivan Uriev
kaust.personThoroddsen, Sigurdur T.
kaust.personZhu, Y.
kaust.grant.numberKUK-C1-013-04
kaust.grant.number7000000028
kaust.acknowledged.supportUnitCompetitive Research Funds


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