Fluid flows created by swimming bacteria drive self-organization in confined suspensions

Fluid flows created by swimming bacteria drive self-organization in confined suspensions.

Concentrated suspensions of swimming microorganisms and other forms of active matter are known to display complex, self-organized spatiotemporal patterns on scales that are large compared with those of the individual motile units. Despite intensive experimental and theoretical study, it has remained unclear the extent to which the hydrodynamic flows generated by swimming cells, rather than pure...

Dynamics of confined suspensions of swimming particles.

Low Reynolds number direct simulations of large populations of hydrodynamically interacting swimming particles confined between planar walls are performed. The results of simulations are compared with a theory that describes dilute suspensions of swimmers. The theory yields scalings with concentration for diffusivities and velocity fluctuations as well as a prediction of the fluid velocity spat...

[Nano world created by self-organization].

Evaporation-driven convective flows in suspensions of non-motile bacteria

Jocelyn Dunstan, ∗ Kyoung J. Lee, Simon F. Park, Yongyun Hwang, and Raymond E. Goldstein Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Cambridge CB3 0WA, United Kingdom Department of Physics, Korea University, Seoul, Korea Faculty of Health & Medical Sciences, University of Surrey, Guildford GU2 5XH, Surrey, United Kingdom ...

Colloidal suspensions in confined geometries

In the presence of geometric confinements such as topographically patterned surfaces, strong light fields, or channels the phase behavior and the dynamical properties of colloidal suspensions are strongly modified in comparison to the bulk properties. Because such geometric confinements play an important role in many physical, biological and chemical processes, investigations of the properties ...