Experimental study of liquid drop impact onto a powder surface

Handle URI:
http://hdl.handle.net/10754/561510
Title:
Experimental study of liquid drop impact onto a powder surface
Authors:
Marston, Jeremy; Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 ) ; Ng, Waikiong; Tan, Reginald
Abstract:
The initial dynamics of liquid drop impact onto powder surfaces is studied experimentally using high-speed photography. For a range of bed packing fractions, φ, liquid physical properties and impact velocities, ui, we observe a variety of phenomena that can be representative of a hydrophobic surface, a rough surface or a porous medium. The solids packing fraction in the bed, 0.38≤φ≤0.65, and the impact Weber number, 3.5≤We=ρDui 2/φ≤750, (where ρ, D and φ are the drop density, diameter and surface tension respectively) are shown to be the critical parameters governing the outcome of an impact. For high packing fractions, φ≳0.5, we show that the observed spreading, rebound and splashing can be broadly characterised in terms of the Weber number while for looser packing fractions, φ≲0.5, we observe powder ejectas and provide a qualitative description of the granule nucleation at the centre of the impact sites. © 2010 Elsevier B.V.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; High-Speed Fluids Imaging Laboratory
Publisher:
Elsevier BV
Journal:
Powder Technology
Issue Date:
Nov-2010
DOI:
10.1016/j.powtec.2010.05.012
Type:
Article
ISSN:
00325910
Sponsors:
This work was supported by the Science and Engineering Research Council of A*STAR (Agency for Science, Technology and Research), Singapore. The authors would like to thank Ng Junwei for assistance in measurements of the powder size distribution and liquid viscosities.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorMarston, Jeremyen
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.contributor.authorNg, Waikiongen
dc.contributor.authorTan, Reginalden
dc.date.accessioned2015-08-02T09:13:07Zen
dc.date.available2015-08-02T09:13:07Zen
dc.date.issued2010-11en
dc.identifier.issn00325910en
dc.identifier.doi10.1016/j.powtec.2010.05.012en
dc.identifier.urihttp://hdl.handle.net/10754/561510en
dc.description.abstractThe initial dynamics of liquid drop impact onto powder surfaces is studied experimentally using high-speed photography. For a range of bed packing fractions, φ, liquid physical properties and impact velocities, ui, we observe a variety of phenomena that can be representative of a hydrophobic surface, a rough surface or a porous medium. The solids packing fraction in the bed, 0.38≤φ≤0.65, and the impact Weber number, 3.5≤We=ρDui 2/φ≤750, (where ρ, D and φ are the drop density, diameter and surface tension respectively) are shown to be the critical parameters governing the outcome of an impact. For high packing fractions, φ≳0.5, we show that the observed spreading, rebound and splashing can be broadly characterised in terms of the Weber number while for looser packing fractions, φ≲0.5, we observe powder ejectas and provide a qualitative description of the granule nucleation at the centre of the impact sites. © 2010 Elsevier B.V.en
dc.description.sponsorshipThis work was supported by the Science and Engineering Research Council of A*STAR (Agency for Science, Technology and Research), Singapore. The authors would like to thank Ng Junwei for assistance in measurements of the powder size distribution and liquid viscosities.en
dc.publisherElsevier BVen
dc.subjectDrop impacten
dc.subjectGranulationen
dc.subjectHigh-speed imagingen
dc.subjectNucleationen
dc.titleExperimental study of liquid drop impact onto a powder surfaceen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentHigh-Speed Fluids Imaging Laboratoryen
dc.identifier.journalPowder Technologyen
dc.contributor.institutionInstitute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, Singapore 627833, Singaporeen
dc.contributor.institutionDepartment of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singaporeen
kaust.authorMarston, Jeremyen
kaust.authorThoroddsen, Sigurdur T.en
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