Collective motion in an active suspension of Escherichia coli bacteria
By J. Gachelin, A. Rousselet, Anke Lindner, Eric Clément. 2014
83 citations recorded by the source corpus.
We investigate experimentally the emergence of collective motion in the bulk of an active suspension of Escherichia coli bacteria. When increasing the concentration from a dilute to a semi-dilute regime, we observe a continuous crossover from a dynamical cluster regime to a regime of ‘bio-turbulence’ convection patterns. We measure a length scale characterizing the collective motion as a function of the bacteria concentration. For bacteria fully supplied with oxygen, the increase of the correlation length is almost linear with concentration and at the largest concentrations tested, the correlation length could be as large as 24 bacterial body sizes (or 7–8 when including the flagella bundle). In contrast, under conditions of oxygen shortage the correlation length saturates at a value of around 7 body lengths.
Subfields: Condensed Matter Physics, Ocean Engineering, Statistical and Nonlinear Physics
View Paper: https://www.semanticscholar.org/paper/3e8b25ddee32a53af77911e26148e30b230bc1b6
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In Condensed Matter Physics
In Ocean Engineering
In Statistical and Nonlinear Physics
Citations in the corpus
- Physics of microswimmers—single particle motion and collective behavior: a review (2014, background): “In assemblies of motile microorganisms, cooperativity reaches a new level as they exhibit highly organized movements with remarkable large-scale patterns such as 33 networks, complex vortices, or swarms (Gachelin et al., 2014; Heinrichsen, 1978; Kearns, 2010; Wensink et al., 2012).”