Drop spreading and penetration into pre-wetted powders

Handle URI:
http://hdl.handle.net/10754/562737
Title:
Drop spreading and penetration into pre-wetted powders
Authors:
Marston, Jeremy; Sprittles, James E.; Zhu, Y.; Li, Erqiang ( 0000-0002-5003-0756 ) ; Vakarelski, Ivan Uriev ( 0000-0001-9244-9160 ) ; Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 )
Abstract:
We 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.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center; Mechanical Engineering Program; High-Speed Fluids Imaging Laboratory
Publisher:
Elsevier
Journal:
Powder Technology
Issue Date:
May-2013
DOI:
10.1016/j.powtec.2013.01.062
Type:
Article
ISSN:
00325910
Sponsors:
This 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.
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.authorMarston, Jeremyen
dc.contributor.authorSprittles, James E.en
dc.contributor.authorZhu, Y.en
dc.contributor.authorLi, Erqiangen
dc.contributor.authorVakarelski, Ivan Urieven
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.date.accessioned2015-08-03T11:03:50Zen
dc.date.available2015-08-03T11:03:50Zen
dc.date.issued2013-05en
dc.identifier.issn00325910en
dc.identifier.doi10.1016/j.powtec.2013.01.062en
dc.identifier.urihttp://hdl.handle.net/10754/562737en
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.en
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.en
dc.publisherElsevieren
dc.subjectDrainageen
dc.subjectDrop impacten
dc.subjectHigh-speed imagingen
dc.subjectMaximum deformationen
dc.titleDrop spreading and penetration into pre-wetted powdersen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentHigh-Speed Fluids Imaging Laboratoryen
dc.identifier.journalPowder Technologyen
dc.contributor.institutionMathematical Institute, University of Oxford, 24-29 St Giles, Oxford, OX1 3LB, United Kingdomen
kaust.authorMarston, Jeremyen
kaust.authorLi, Erqiangen
kaust.authorVakarelski, Ivan Urieven
kaust.authorThoroddsen, Sigurdur T.en
kaust.authorZhu, Y.en
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