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Communication Dans Un Congrès Année : 2019

Collective effects in bacterial suspensions

Résumé

Bacteria are simple living beings endowed, for some of them, with long flagellar filaments that are considered as motility organs. Provided they find a micro- scopic energy source, they use flagella rotation to self-propel in the medium at low Reynolds number. Although planktonic bacteria exhibit a “run and tumble” motility yielding to a large-scale diffusion, dense suspensions of swim- ming bacteria display remarkable properties such as the appearance of collective motions, i.e. local bacterial ordering associated with a characteristic correla- tion length scale, reminiscent of turbulent phenomenon. This behavior emerging from the group confers unconventional macroscopic properties to the suspension and leads to a new paradigmatic approach of these out-of-equilibrium physical and hydrodynamical active systems.
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Dates et versions

hal-04490029 , version 1 (05-03-2024)

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  • HAL Id : hal-04490029 , version 1

Citer

Jochen Arlt, Eric Clement, Pierre-Henri Delville, Vincent Martinez, Wilson C. K. Poon, et al.. Collective effects in bacterial suspensions. WE-Heraeus Summer School 2022 - Active Matter and Complex Media, Sep 2019, Cargese (Corse), France. ⟨hal-04490029⟩
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