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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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MD5: 80A95823872D13131D8A0E3782C7DB12
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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
UDK:
532.5
ISSN pri članku:
1744-683X
DOI:
10.1039/C9SM00023B
COBISS.SI-ID:
3289188
Datum objave v RUL:
06.03.2019
Število ogledov:
1217
Število prenosov:
480
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Objavi na:
Gradivo je del revije
Naslov:
Soft matter
Založnik:
Royal Society of Chemistry
ISSN:
1744-683X
COBISS.SI-ID:
19616551
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
dinamika tekočin
,
mikrofluidika
,
bakterije
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