University of Cambridge > Talks.cam > Chemical Engineering and Biotechnology Departmental Seminars > Active bacterial suspensions: from individual effort to team work

Active bacterial suspensions: from individual effort to team work

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Bacteria swimming in a fluid induce very deep changes in the macroscopic transport properties and in the constitutive relations of the suspension. We are interested in understanding the hydrodynamics of those fluids laden with active particles. We currently study various phenomena associated with the swimming activity such as the activated Brownian motion, the emergence of collective motion, the viscous response and the hydrodynamic dispersion. I will discuss more specifically how a sheared suspension of bacteria may display a viscosity decreasing with concentration and how at large concentrations, it may undergo a transition to a ``superfluid-like’’ regime where macroscopic viscosity apparently vanishes.

This talk is part of the Chemical Engineering and Biotechnology Departmental Seminars series.

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