Navier slip model of drag reduction by Leidenfrost vapor layers

Handle URI:
http://hdl.handle.net/10754/625907
Title:
Navier slip model of drag reduction by Leidenfrost vapor layers
Authors:
Berry, Joseph D. ( 0000-0002-0961-7782 ) ; Vakarelski, Ivan Uriev ( 0000-0001-9244-9160 ) ; Chan, Derek Y. C. ( 0000-0002-2156-074X ) ; Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 )
Abstract:
Recent experiments found that a hot solid sphere that is able to sustain a stable Leidenfrost vapor layer in a liquid exhibits significant drag reduction during free fall. The variation of the drag coefficient with Reynolds number deviates substantially from the characteristic drag crisis behavior at high Reynolds numbers. Measurements based on liquids of different viscosities show that the onset of the drag crisis depends on the viscosity ratio of the vapor to the liquid. Here we attempt to characterize the complexity of the Leidenfrost vapor layer with respect to its variable thickness and possible vapor circulation within, in terms of the Navier slip model that is defined by a slip length. Such a model can facilitate tangential flow and thereby alter the behavior of the boundary layer. Direct numerical and large eddy simulations of flow past a sphere at moderate to high Reynolds numbers (102≤Re≤4×104) are employed to quantify comparisons with experimental results, including the drag coefficient and the form of the downstream wake on the sphere. This provides a simple one parameter characterization of the drag reduction phenomenon due to a stable vapor layer that envelops a solid body.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Berry JD, Vakarelski IU, Chan DYC, Thoroddsen ST (2017) Navier slip model of drag reduction by Leidenfrost vapor layers. Physics of Fluids 29: 107104. Available: http://dx.doi.org/10.1063/1.4993298.
Publisher:
AIP Publishing
Journal:
Physics of Fluids
Issue Date:
17-Oct-2017
DOI:
10.1063/1.4993298
Type:
Article
ISSN:
1070-6631; 1089-7666
Sponsors:
This work was supported by the King Abdullah University of Science and Technology (KAUST). D.Y.C.C. was supported by the Australian Research Council through a Discovery Project Grant No. DP170100376.
Additional Links:
http://aip.scitation.org/doi/10.1063/1.4993298
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorBerry, Joseph D.en
dc.contributor.authorVakarelski, Ivan Urieven
dc.contributor.authorChan, Derek Y. C.en
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.date.accessioned2017-10-19T07:10:41Z-
dc.date.available2017-10-19T07:10:41Z-
dc.date.issued2017-10-17en
dc.identifier.citationBerry JD, Vakarelski IU, Chan DYC, Thoroddsen ST (2017) Navier slip model of drag reduction by Leidenfrost vapor layers. Physics of Fluids 29: 107104. Available: http://dx.doi.org/10.1063/1.4993298.en
dc.identifier.issn1070-6631en
dc.identifier.issn1089-7666en
dc.identifier.doi10.1063/1.4993298en
dc.identifier.urihttp://hdl.handle.net/10754/625907-
dc.description.abstractRecent experiments found that a hot solid sphere that is able to sustain a stable Leidenfrost vapor layer in a liquid exhibits significant drag reduction during free fall. The variation of the drag coefficient with Reynolds number deviates substantially from the characteristic drag crisis behavior at high Reynolds numbers. Measurements based on liquids of different viscosities show that the onset of the drag crisis depends on the viscosity ratio of the vapor to the liquid. Here we attempt to characterize the complexity of the Leidenfrost vapor layer with respect to its variable thickness and possible vapor circulation within, in terms of the Navier slip model that is defined by a slip length. Such a model can facilitate tangential flow and thereby alter the behavior of the boundary layer. Direct numerical and large eddy simulations of flow past a sphere at moderate to high Reynolds numbers (102≤Re≤4×104) are employed to quantify comparisons with experimental results, including the drag coefficient and the form of the downstream wake on the sphere. This provides a simple one parameter characterization of the drag reduction phenomenon due to a stable vapor layer that envelops a solid body.en
dc.description.sponsorshipThis work was supported by the King Abdullah University of Science and Technology (KAUST). D.Y.C.C. was supported by the Australian Research Council through a Discovery Project Grant No. DP170100376.en
dc.publisherAIP Publishingen
dc.relation.urlhttp://aip.scitation.org/doi/10.1063/1.4993298en
dc.rightsArchived with thanks to Physics of Fluidsen
dc.titleNavier slip model of drag reduction by Leidenfrost vapor layersen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysics of Fluidsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Chemical and Biomolecular Engineering, University of Melbourne, Parkville, Victoria 3010, Australiaen
dc.contributor.institutionDepartment of Mathematics, Swinburne University of Technology, Hawthorn, Victoria 3122, Australiaen
dc.contributor.institutionSchool of Mathematics and Statistics, University of Melbourne, Parkville, Victoria 3010, Australiaen
kaust.authorVakarelski, Ivan Urieven
kaust.authorThoroddsen, Sigurdur T.en
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