首页|Propulsion of microorganisms by a helical flagellum

Propulsion of microorganisms by a helical flagellum

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  • NETL
  • NSTL
  • Natl Acad Sciences
The motion of bacteria and nanobots propelled by rotating helical flagella is often interpreted using resistive force theory (1, 2), which approximates the total force on a flagellum by summing the forces from each small segment, ignoring long-range fluid interactions. We test this theory in laboratory measurements on rotating helices and compare the measurements to predictions of resistive force theory and also to slender body and Stokeslet theories, which include long-range fluid interactions. The predictions from our numerical simulations of slender body and Stokeslet theories are found to agree well with our laboratory measurements, but the results of these simulations and experiments differ greatly from the predictions of resistive force theory.

Bruce Rodenborn、Chih-Hung Chen、Harry L. Swinney、Bin Liu、H. P. Zhang

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Department of Physics and Center for Nonlinear Dynamics, University of Texas at Austin, Austin, TX 78712

School of Engineering, Brown University, Providence, RI 02912

Department of Physics and Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China

2013

10.1073/pnas.1219831110

Proceedings of the National Academy of Sciences of the United States of America

Proceedings of the National Academy of Sciences of the United States of America

ISSN：0027-8424
年,卷(期)：2013.110(5)
  • 104
  • 42