Squeeze flow of a Carreau fluid during sphere impact

Handle URI:
http://hdl.handle.net/10754/552827
Title:
Squeeze flow of a Carreau fluid during sphere impact
Authors:
Uddin, J.; Marston, J. O.; Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 )
Abstract:
We present results from a combined numerical and experimental investigation into the squeeze flow induced when a solid sphere impacts onto a thin, ultra-viscous film of non-Newtonian fluid. We examine both the sphere motion through the liquid as well as the fluid flow field in the region directly beneath the sphere during approach to a solid plate. In the experiments we use silicone oil as the model fluid, which is well-described by the Carreau model. We use high-speed imaging and particle tracking to achieve flow visualisation within the film itself and derive the corresponding velocity fields. We show that the radial velocity either diverges as the gap between the sphere and the wall diminishes (Z tip → 0) or that it reaches a maximum value and then decays rapidly to zero as the sphere comes to rest at a non-zero distance (Z tip = Z min ) away from the wall. The horizontal shear rate is calculated and is responsible for significant viscosity reduction during the approach of the sphere. Our model of this flow, based on lubrication theory, is solved numerically and compared to experimental trials. We show that our model is able to correctly describe the physical features of the flow observed in the experiments.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division
Citation:
Squeeze flow of a Carreau fluid during sphere impact 2012, 24 (7):073104 Physics of Fluids
Journal:
Physics of Fluids
Issue Date:
19-Jul-2012
DOI:
10.1063/1.4736742
Type:
Article
ISSN:
10706631
Additional Links:
http://scitation.aip.org/content/aip/journal/pof2/24/7/10.1063/1.4736742
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorUddin, J.en
dc.contributor.authorMarston, J. O.en
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.date.accessioned2015-05-14T08:41:34Zen
dc.date.available2015-05-14T08:41:34Zen
dc.date.issued2012-07-19en
dc.identifier.citationSqueeze flow of a Carreau fluid during sphere impact 2012, 24 (7):073104 Physics of Fluidsen
dc.identifier.issn10706631en
dc.identifier.doi10.1063/1.4736742en
dc.identifier.urihttp://hdl.handle.net/10754/552827en
dc.description.abstractWe present results from a combined numerical and experimental investigation into the squeeze flow induced when a solid sphere impacts onto a thin, ultra-viscous film of non-Newtonian fluid. We examine both the sphere motion through the liquid as well as the fluid flow field in the region directly beneath the sphere during approach to a solid plate. In the experiments we use silicone oil as the model fluid, which is well-described by the Carreau model. We use high-speed imaging and particle tracking to achieve flow visualisation within the film itself and derive the corresponding velocity fields. We show that the radial velocity either diverges as the gap between the sphere and the wall diminishes (Z tip → 0) or that it reaches a maximum value and then decays rapidly to zero as the sphere comes to rest at a non-zero distance (Z tip = Z min ) away from the wall. The horizontal shear rate is calculated and is responsible for significant viscosity reduction during the approach of the sphere. Our model of this flow, based on lubrication theory, is solved numerically and compared to experimental trials. We show that our model is able to correctly describe the physical features of the flow observed in the experiments.en
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/pof2/24/7/10.1063/1.4736742en
dc.rightsArchived with thanks to Physics of Fluidsen
dc.titleSqueeze flow of a Carreau fluid during sphere impacten
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysics of Fluidsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSchool of Mathematics, University of Birmingham, Edgbaston, B15 2TT, United Kingdomen
kaust.authorMarston, Jeremyen
kaust.authorThoroddsen, Sigurdur T.en
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