Driving kinetically constrained models into non-equilibrium steady states: Structural and slow transport properties

Francesco Turci, Estelle Pitard, Mauro Sellitto

Research output: Contribution to journalArticle (Academic Journal)peer-review

16 Citations (Scopus)
305 Downloads (Pure)

Abstract

Complex fluids in shear flow and biased dynamics in crowded environments exhibit counterintuitive features which are difficult to address both at theoretical level and by molecular dynamic simulations. To understand some of these features we study a schematic model of highly viscous liquid, the 2D Kob-Andersen kinetically constrained model, driven into non-equilibrium steady states by a uniform non-Hamiltonian force. We present a detailed numerical analysis of the microscopic behavior of the model, including transversal and longitudinal spatial correlations and dynamic heterogeneities. In particular, we show that at high particle density the transition from positive to negative resistance regimes in the current vs field relation can be explained via the emergence of nontrivial structures that intermittently trap the particles and slow down the dynamics. We relate such spatial structures to the current vs field relation in the different transport regimes.
Original languageEnglish
Article number031112
Number of pages10
JournalPhysical Review E: Statistical, Nonlinear, and Soft Matter Physics
Volume86
Issue number3
DOIs
Publication statusPublished - 10 Sep 2012

Keywords

  • cond-mat.soft

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