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Article Dans Une Revue Journal of the Royal Society Interface Année : 2017

Flagella bending affects macroscopic properties of bacterial suspensions

Résumé

To survive in harsh conditions, motile bacteria swim in complex environment and respond to the surrounding flow. Here we develop a PDE model describing how the flagella bending affects macroscopic properties of bacterial suspensions. First, we show how the flagella bending contributes to the decrease of the effective viscosity observed in dilute suspension. Our results do not impose tumbling (random re-orientation) as it was done previously to explain the viscosity reduction. Second, we demonstrate a possibility of bacterium escape from the wall entrapment due to the self-induced buckling of flagella. Our results shed light on the role of flexible bacterial flagella in interactions of bacteria with shear flow and walls or obstacles.

Dates et versions

hal-01597257 , version 1 (28-09-2017)

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Mykhailo Potomkin, Magali Tournus, Leonid Berlyand, Igor Aranson. Flagella bending affects macroscopic properties of bacterial suspensions. Journal of the Royal Society Interface, 2017, 14 (130), ⟨10.1098/rsif.2016.1031⟩. ⟨hal-01597257⟩
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