TY - JOUR
T1 - Self-concentration and large-scale coherence in bacterial dynamics
AU - Dombrowski, Christopher
AU - Cisneros, Luis
AU - Chatkaew, Sunita
AU - Goldstein, Raymond E.
AU - Kessler, John O.
PY - 2004/8/27
Y1 - 2004/8/27
N2 - The collective effects in bacterial suspensions in which strong microscale mixing arises from self-concentration and large-scale dynamic coherence were described. Self-concentration arose from chemotactically generated accumulations of cells that encounter, then slide down a slanted meniscus, resulting in even higher concentrations. The consumption of dissolved oxygen by cells and its replenishment from the fluid-air interface sets the stage for bioconvection. The results show that in the concentrated regime the temporal evolution must include an advective component, the fluid velocity determined self-consistently with the density.
AB - The collective effects in bacterial suspensions in which strong microscale mixing arises from self-concentration and large-scale dynamic coherence were described. Self-concentration arose from chemotactically generated accumulations of cells that encounter, then slide down a slanted meniscus, resulting in even higher concentrations. The consumption of dissolved oxygen by cells and its replenishment from the fluid-air interface sets the stage for bioconvection. The results show that in the concentrated regime the temporal evolution must include an advective component, the fluid velocity determined self-consistently with the density.
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U2 - 10.1103/PhysRevLett.93.098103
DO - 10.1103/PhysRevLett.93.098103
M3 - Article
C2 - 15447144
AN - SCOPUS:19544371919
VL - 93
SP - 098103-1-098103-4
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 9
M1 - 098103
ER -