Shearing active gels close to the isotropic-nematic transition.

@article{Cates2008ShearingAG,
  title={Shearing active gels close to the isotropic-nematic transition.},
  author={Michael E Cates and Suzanne M. Fielding and Davide Marenduzzo and Enzo Orlandini and Julia M. Yeomans},
  journal={Physical review letters},
  year={2008},
  volume={101 6},
  pages={068102}
}
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… CONTINUE READING
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