Thermocapillary effects on viscoelastic drops suspended in axisymmetric pressure driven flows

Show simple item record Vyas, Malay Ghosh, Uddipta
dc.coverage.spatial United States of America 2021-12-24T11:50:55Z 2021-12-24T11:50:55Z 2021-12
dc.identifier.citation Vyas, Malay and Ghosh, Uddipta, "Thermocapillary effects on viscoelastic drops suspended in axisymmetric pressure driven flows", Physics of Fluids, DOI: 10.1063/5.0074783, vol. 33, no. 12, Dec. 2021 en_US
dc.identifier.issn 1070-6631
dc.identifier.issn 1089-7666
dc.description.abstract The first two asymptotic corrections to the leading order Newtonian behavior are reported here, in the limit of small Deborah and Capillary numbers, which, respectively, characterize the extent of viscoelasticity and interfacial deformation. We establish that the viscoelastic properties of the inner phase strongly influence the migration velocity and the interfacial deformation of the drop. Our analysis reveals the possibility of realizing a maximum migration velocity for an intermediate viscosity of the interior phase, provided it has stronger viscoelastic characteristics than the suspending medium. We further compute the critical thermal gradient required to completely arrest the drop's motion and demonstrate that the same depends on the Deborah number as well as the viscosity of the inner phase. The viscoelastic stresses also dictate the deformation as the drop's shape changes from prolate to oblate when those stresses become significant. Our results may find potential applications in areas such as polymer processing and handling of biologically relevant media in medical diagnostics
dc.description.statementofresponsibility by Malay Vyas and Uddipta Ghosh
dc.format.extent vol. 33, no. 12
dc.language.iso en_US en_US
dc.publisher American Institute of Physics en_US
dc.subject Viscoelastic drop en_US
dc.subject Phan�Thien�Tanner constitutive model en_US
dc.subject Deborah and Capillary numbers en_US
dc.subject Deborah number en_US
dc.title Thermocapillary effects on viscoelastic drops suspended in axisymmetric pressure driven flows en_US
dc.type Article en_US
dc.relation.journal Physics of Fluids

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