Nonlinear dynamics and rheology of active fluids: Simulations in two dimensions

S. M. Fielding, D. Marenduzzo, M. E. Cates

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We report simulations of a continuum model for (apolar, flow aligning) active fluids in two dimensions. Both free and anchored boundary conditions are considered, at parallel confining walls that are either static or moving at fixed relative velocity. We focus on extensile materials and find that steady shear bands, previously shown to arise ubiquitously in one dimension for the active nematic phase at small (or indeed zero) shear rate, are generally replaced in two dimensions by more complex flow patterns that can be stationary, oscillatory, or apparently chaotic. The consequences of these flow patterns for time-averaged steady-state rheology are examined.

Original languageEnglish
Article number041910
Pages (from-to)-
Number of pages14
JournalPhysical Review E
Volume83
Issue number4
DOIs
Publication statusPublished - 13 Apr 2011

Keywords / Materials (for Non-textual outputs)

  • SHEAR-FLOW
  • HYDRODYNAMICS
  • TRANSITION

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