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Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Jun;91(6):063002. Epub 2015 Jun 4.

Steady-state deformation behavior of confined composite droplets under shear flow.

Author information

1
Semenov Institute of Chemical Physics of Russian Academy of Sciences, 4, Kosygin Street, Moscow, 119991, Russia.
2
Institute of Problems of Chemical Physics of Russian Academy of Sciences, 1, Semenov Avenue, Chernogolovka, Moscow Region, 142432, Russia.

Abstract

The shear-induced dynamics of two-dimensional composite droplets in a narrow channel is investigated numerically. The droplets consist of a viscous inner droplet (core) and shell immersed in a continuous Newtonian fluid. Attention is focused on studying the effects of confinement at different core-to-shell radii ratios, relative viscosities of the medium components, and interfacial tensions on the steady-state deformation and orientation of a composite droplet. The role of the "sustaining" effect due to the internal core and competition between the near-wall shear flow and downward and upward secondary streams is discussed.

PMID:
26172787
DOI:
10.1103/PhysRevE.91.063002
[Indexed for MEDLINE]

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