Reduction of viscosity in suspension of swimming bacteria.

  title={Reduction of viscosity in suspension of swimming bacteria.},
  author={Andrey Sokolov and Igor Aranson},
  journal={Physical review letters},
  volume={103 14},
Measurements of the shear viscosity in suspensions of swimming Bacillus subtilis in free-standing liquid films have revealed that the viscosity can decrease by up to a factor of 7 compared to the viscosity of the same liquid without bacteria or with nonmotile bacteria. The reduction in viscosity is observed in two complementary experiments: one studying the decay of a large vortex induced by a moving probe and another measuring the viscous torque on a rotating magnetic particle immersed in the… CONTINUE READING