Shearing active gels close to the isotropic-nematic transition

Michael Cates, S. M. Fielding, D. Marenduzzo, E. Orlandini, J. M. Yeomans

Research output: Contribution to journalArticlepeer-review

Abstract

We study numerically the rheological properties of a slab of active gel close to the isotropic-nematic transition. The flow behavior shows a strong dependence on the sample size, boundary conditions, and on the bulk constitutive curve, which, on entering the nematic phase, acquires an activity-induced discontinuity at the origin. The precursor of this within the metastable isotropic phase for contractile systems (e. g., actomyosin gels) gives a viscosity divergence; its counterpart for extensile suspensions admits instead a shear-banded flow with zero apparent viscosity.

Original languageEnglish
Article number068102
Pages (from-to)-
Number of pages4
JournalPhysical Review Letters
Volume101
Issue number6
DOIs
Publication statusPublished - 8 Aug 2008

Keywords

  • SPONTANEOUS FLOW
  • POLAR GELS
  • PARTICLES
  • MOTORS

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