A dynamic preferred direction model for the self-organization dynamics of bacterial microfluidic pumping
ID Svenšek, Daniel (Author), ID Pleiner, Harald (Author), ID Brand, Helmut R. (Author)

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It is known that some flagellated bacteria like Serratia marcescens, when deposited and affixed onto a surface to form a “bacterial carpet”, self-organize in a collective motion of the flagella that is capable of pumping fluid through microfluidic channels. We set up a continuum model comprising two macroscopic variables that is capable of describing this self-organization mechanism as well as quantifying it to the extent that an agreement with the experimentally observed channel width dependence of the pumping is reached. The activity is introduced through a collective angular velocity of the helical flagella rotation, which is an example of a dynamic macroscopic preferred direction. Our model supports and quantifies the view that the self-coordination is due to a positive feedback loop between the bacterial flagella and the local flow generated by their rotation. Moreover, our results indicate that this biological active system is operating close to the self-organization threshold.

Keywords:fluid dynamics, microfluidics, bacteria
Typology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Number of pages:Str. 2032-2042
Numbering:Vol. 15, iss. 9
PID:20.500.12556/RUL-106572 This link opens in a new window
ISSN on article:1744-683X
DOI:10.1039/C9SM00023B This link opens in a new window
COBISS.SI-ID:3289188 This link opens in a new window
Publication date in RUL:06.03.2019
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Record is a part of a journal

Title:Soft matter
Publisher:Royal Society of Chemistry
COBISS.SI-ID:19616551 This link opens in a new window

Secondary language

Keywords:dinamika tekočin, mikrofluidika, bakterije

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