Globally aligned states and hydrodynamic traffic jams in confined suspensions of active asymmetric particles.

@article{Lefauve2014GloballyAS,
  title={Globally aligned states and hydrodynamic traffic jams in confined suspensions of active asymmetric particles.},
  author={Adrien Lefauve and David Saintillan},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  year={2014},
  volume={89 2},
  pages={021002}
}
Strongly confined active liquids are subject to unique hydrodynamic interactions due to momentum screening and lubricated friction by the confining walls. Using numerical simulations, we demonstrate that two-dimensional dilute suspensions of fore-aft asymmetric polar swimmers in a Hele-Shaw geometry can exhibit a rich variety of novel phase behaviors depending on particle shape, including coherent polarized density waves with global alignment, persistent counterrotating vortices, density shocks… CONTINUE READING

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