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Nonequilibrium phase transition in the sedimentation of reproducing particles

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Original languageEnglish
Article number100602
Pages (from-to)-
Number of pages4
JournalPhysical Review Letters
Volume101
Issue number10
DOIs
Publication statusPublished - 5 Sep 2008

Abstract

We study numerically and analytically the dynamics of a sedimenting suspension of active, reproducing particles, such as growing bacteria in a gravitational field. In steady state we find a nonequilibrium phase transition between a "sedimentation" regime, analogous to the sedimentation equilibrium of passive colloids, and a "uniform" regime, in which the particle density is constant in all but the top and bottom of the sample. We discuss the importance of fluctuations in particle density in locating the phase-transition point, and report the kinetics of sedimentation at early times.

    Research areas

  • ESCHERICHIA-COLI, CHEMOTAXIS, STATES, FRONT, MODEL

ID: 1287752