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

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Izvleček
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.

Jezik:Angleški jezik
Ključne besede:fluid dynamics, microfluidics, bacteria
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FMF - Fakulteta za matematiko in fiziko
Leto izida:2019
Št. strani:Str. 2032-2042
Številčenje:Vol. 15, iss. 9
PID:20.500.12556/RUL-106572 Povezava se odpre v novem oknu
UDK:532.5
ISSN pri članku:1744-683X
DOI:10.1039/C9SM00023B Povezava se odpre v novem oknu
COBISS.SI-ID:3289188 Povezava se odpre v novem oknu
Datum objave v RUL:06.03.2019
Število ogledov:1146
Število prenosov:467
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je del revije

Naslov:Soft matter
Založnik:Royal Society of Chemistry
ISSN:1744-683X
COBISS.SI-ID:19616551 Povezava se odpre v novem oknu

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Jezik:Slovenski jezik
Ključne besede:dinamika tekočin, mikrofluidika, bakterije

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