Hauptseminar Porous Media SS 2021/Bacteria in porous media

Date

2021-07-02

Time

14:30

Topic

Modelling bacteria in porous media

Speaker

Kevin Vietz

Tutor

Christoph Lohrmann

Handout

[1]

Contents

Motile bacteria are a prime example of active matter. They are, in contrast to passive particles like molecules or colloids, far from equilibrium in any system because of their self-propulsion. This leads to interesting and sometimes counterintuitive transport properties, especially if the swimmers are placed in porous confinement.

This talk covers the fundamentals of the statistics and hydrodynamics of confined motile active matter at the micrometer scale. For different regimes of pore sizes, the relevant physics of the interplay between motility, confinement and external flow are discussed: For small pores, confinement determines the motility pattern, whereas for large surfaces hydrodynamics is the dominant factor. For intermediate pore sizes, all effects act together and create interesting phenomena. We will also highlight industrial applications of bacteria in porous media.

Literature

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  [PDF] (9.0 MB) [DOI]
• Tapomoy Bhattacharjee, Sujit S. Datta.
  Bacterial hopping and trapping in porous media.
  Nature Communications 10(1):1–9, 2019.
  [PDF] (2.2 MB) [DOI]
• Roberto Rusconi, Jeffrey S Guasto, Roman Stocker.
  Bacterial transport suppressed by fluid shear.
  Nature physics 10(3):212–217, 2014.
  
• Donovan Mujah, Mohamed A Shahin, Liang Cheng.
  State-of-the-art review of biocementation by microbially induced calcite precipitation (MICP) for soil stabilization.
  Geomicrobiology Journal 34(6):524–537, 2017.
  [PDF] (1.2 MB)