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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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Abstract
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.
Language:
English
Keywords:
fluid dynamics
,
microfluidics
,
bacteria
Typology:
1.01 - Original Scientific Article
Organization:
FMF - Faculty of Mathematics and Physics
Year:
2019
Number of pages:
Str. 2032-2042
Numbering:
Vol. 15, iss. 9
PID:
20.500.12556/RUL-106572
UDC:
532.5
ISSN on article:
1744-683X
DOI:
10.1039/C9SM00023B
COBISS.SI-ID:
3289188
Publication date in RUL:
06.03.2019
Views:
1216
Downloads:
480
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Record is a part of a journal
Title:
Soft matter
Publisher:
Royal Society of Chemistry
ISSN:
1744-683X
COBISS.SI-ID:
19616551
Secondary language
Language:
Slovenian
Keywords:
dinamika tekočin
,
mikrofluidika
,
bakterije
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