Flow Generation by Rotating Colloids in Planar Microchannels

Details Flow Generation by Rotating Colloids in Planar Microchannels Flow Generation by Rotating Colloids in Planar Microchannels

2011-02-15

arxiv.org/abs/1102.3054v1

EPL, 92 (2010) 64003

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

http://epljournal.edpsciences.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/epl/abs/2010/24/epl13212

Scientific paper

10.1209/0295-5075/92/64003

Non-equilibrium structure formation and conversion of spinning to translational motion of magnetic colloids driven by an external rotating magnetic field in microchannels is studied by particle-based mesoscale hydrodynamics simulations. For straight channels, laning is found. In ring channels, the channel curvature breaks symmetry and leads to a net fluid transport around the annulus with the same rotational direction as the colloidal spinning direction. The dependence of the translational velocity on channel width, ring radius, colloid concentration, and thermal motion is predicted.

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