Shear-Induced Dynamic Polarization and Mesoscopic Structure in Suspensions of Polar Nanorods

Sebastian Heidenreich, Siegfried Hess, and Sabine H. L. Klapp
Phys. Rev. Lett. 102, 028301 – Published 13 January 2009

Abstract

We investigate the spatiotemporal behavior of sheared suspensions of rodlike particles with permanent dipole moments. Our calculations are based on a self-consistent hydrodynamic model including feedback effects between orientational motion and velocity profile. The competition between shear-induced tumbling motion and the boundary conditions imposed by plates leads to oscillatory alignment structures. These give rise to a spontaneous time-dependent polarization generating, in turn, magnetic fields. This novel shear-induced effect is robust against varying the boundary conditions. The field strengths are of a measurable magnitude for a broad parameter range.

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  • Received 31 July 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.028301

©2009 American Physical Society

Authors & Affiliations

Sebastian Heidenreich1, Siegfried Hess1, and Sabine H. L. Klapp2

  • 1Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany
  • 2Institut für Theoretische Physik, Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany

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Vol. 102, Iss. 2 — 16 January 2009

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