Raymond E. Goldstein

TL;DR: It is found in sessile drops that flows related to those in the Boycott effect of sedimentation carry bioconvective plumes down the slanted meniscus and concentrate cells at the drop edge, while in pendant drops such self-concentration occurs at the bottom.

TL;DR: In this paper, the authors combine experiments, particle simulations, and continuum theory to identify the statistical properties of self-sustained meso-scale turbulence in active systems, and propose a minimal continuum model for incompressible bacterial flow.

TL;DR: Direct measurements of the bacterial flow field generated by individual swimming Escherichia coli both far from and near to a solid surface are reported, implying that physical interactions between bacteria are determined by steric collisions and near-field lubrication forces.

TL;DR: The concentration dependence of correlations in the collective state is probed with a novel technique that herds bacteria into condensed populations of adjustable concentration, and for the particular thin-film geometry employed the correlation lengths vary smoothly and monotonically through the transition from individual to collective behavior.

TL;DR: Using the geometry of a sessile drop, in suspensions of Bacillus subtilis the self-organized generation of a persistent hydrodynamic vortex is demonstrated that traps cells near the contact line and enhances uptake of oxygen into the suspension.