Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/48638
Title: Measurement of a Structured Backflow in an Open Small Channel Induced by Surface-Tension Gradients
Author: Pulido Companys, Alba
Claret Bonet, Josep
Ignés i Mullol, Jordi
Sagués i Mestre, Francesc
Keywords: Microfluídica
Hidrodinàmica
Viscositat
Biomolècules
Mecànica de fluids
Microfluidics
Hydrodynamics
Viscosity
Biomolecules
Fluid mechanics
Issue Date: 24-May-2013
Publisher: American Physical Society
Abstract: We present experiments in which the laterally confined flow of a surfactant film driven by controlled surface tension gradients causes the subtended liquid layer to self-organize into an inner upstream microduct surrounded by the downstream flow. The anomalous interfacial flow profiles and the concomitant backflow are a result of the feedback between two-dimensional and three-dimensional microfluidics realized during flow in open microchannels. Bulk and surface particle image velocimetry data combined with an interfacial hydrodynamics model explain the dependence of the observed phenomena on channel geometry.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevLett.110.214506
It is part of: Physical Review Letters, 2013, vol. 110, p. 214506-1-214506-5
Related resource: http://dx.doi.org/10.1103/PhysRevLett.110.214506
URI: http://hdl.handle.net/2445/48638
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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