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Singular-point characterization in microscopic flows

Journal article
Authors Giorgio Volpe
Giovanni Volpe
Dmitri Petrov
Published in Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume 77
ISSN 15393755
Publication year 2008
Published at
Language en
Subject categories Physical Sciences

Abstract

We suggest an approach to microrheology based on optical traps capable of measuring fluid fluxes around singular points of fluid flows. We experimentally demonstrate this technique, applying it to the characterization of controlled flows produced by a set of birefringent spheres spinning due to the transfer of light angular momentum. Unlike the previous techniques, this method is able to distinguish between a singular point in a complex flow and the absence of flow at all; furthermore it permits us to characterize the stability of the singular point. © 2008 The American Physical Society.

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Denna text är utskriven från följande webbsida:
http://www.gu.se/english/research/publication/?publicationId=262159
Utskriftsdatum: 2020-05-27