Characterization of hydrodynamic surface interactions of Escherichia coli cell bodies in shear flow.
We experimentally demonstrate that nonflagellated Escherichia coli strains follow modified Jeffery orbits in shear flow near a surface. We fully characterize their Jeffery orbits as a function of their aspect ratios and distance from that surface. Thanks to the linearity of Navier-Stokes equations under low-Reynolds-number conditions, the hydrodynamic body-wall interactions described here can be superimposed with flagellar motility and Brownian motion to construct models that explain the full picture of bacterial motility near a surface under shear flow.
Kaya
Tolga
T
Electrical Engineering Department, Yale University, New Haven, Connecticut 06520-8284, USA.
Koser
Hur
H
D004926:Escherichia coli / Q000737:chemistry / Q000502:physiology*; D008954:Models, Biological; D013499:Surface Properties