Edinburgh Research Explorer

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

Research output: Contribution to journalArticle

Related Edinburgh Organisations

Original languageEnglish
Article number041910
Pages (from-to)-
Number of pages14
JournalPhysical Review E - Statistical, Nonlinear and Soft Matter Physics
Volume83
Issue number4
DOIs
StatePublished - 13 Apr 2011

Abstract

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.

    Research areas

  • SHEAR-FLOW, HYDRODYNAMICS, TRANSITION

ID: 1451807