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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
Mecànica de fluids
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:
It is part of: Physical Review Letters, 2013, vol. 110, p. 214506-1-214506-5
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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