Run-and-tumble dynamics in a crowded environment: persistent exclusion process for swimmers.

The effect of crowding on the run-and-tumble dynamics of swimmers such as bacteria is studied using a discrete lattice model of mutually excluding particles that move with constant velocity along a direction that is randomized at a rate α. In stationary state, the system is found to break into dense clusters in which particles are trapped or stopped from moving. The characteristic size of these clusters predominantly scales as α(-0.5) in both one and two dimensions. For a range of densities, due to cooperative effects, the stopping time scales as T(1d)(0.85) and as T(2d)(0.8), where T(d) is the diffusive time associated with the motion of cluster boundaries. Our findings might be helpful in understanding the early stages of biofilm formation.

• Publication year

  2013

• Venue

  Physical review. E, Statistical, nonlinear, and soft matter physics

• Publication date

  2013-06-03

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevE.89.012706arXiv 1306.0481PMID 24580256
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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