Tumbling of asymmetric microrods in a microchannel flow
Journal article, 2016

We describe results of measurements of the orientational motion of glass microrods in a microchannel flow, following the orientational motion of particles with different shapes. We determine how the orientational dynamics depends on the shape of the particle and on its initial orientation. We find that the dynamics depends so sensitively on the degree to which particle axisymmetry is broken that it is difficult to find particles that are sufficiently axisymmetric so that they exhibit periodic tumbling ("Jeffery orbits"). The results of our measurements confirm earlier theoretical analysis predicting sensitive dependence on particle shape and its initial orientation. Our results illustrate the different types of orientational dynamics for asymmetric particles predicted by theory.

Jeffery orbits


Jonas Einarsson

University of Gothenburg

Besira Mekonnen Mihiretie

University of Gothenburg

Alexander Laas

Staffan Ankardal

J.R. Angilella

Dag Hanstorp

University of Gothenburg

Bernhard Mehlig

University of Gothenburg

Physics of Fluids

1070-6631 (ISSN) 1089-7666 (eISSN)

Vol. 28 1

Subject Categories

Physical Sciences

Fluid Mechanics and Acoustics



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