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11 - Self-Propulsion and Surfaces

from Part Three - INTERACTIONS

Published online by Cambridge University Press:  09 September 2020

Eric Lauga
Affiliation:
University of Cambridge
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Summary

The presence of surfaces near a swimmer can impact dramatically its ability to generate propulsive forces for locomotion. In this eleventh chapter, we review theways in which boundaries influence cellular propulsion from a hydrodynamic standpoint. At the cellular level, both the distribution of cells and their swimming kinematics are affected. On smaller length scales, boundaries govern the ability of appendages such as cilia to produce net forces and flow. We first consider length scales much larger than those of the cells. We show how the method of images for hydrodynamic singularities can be used to demonstrate that long-range hydrodynamic interactions lead to the attraction of swimming cells by boundaries and to a change in the swimming kinematics of bacteria from straight to circular. We then examine the dynamics of swimming cells in shear flows and explain how the presence of a surface leads to cell reorientation and upstream swimming. We next revisit the waving sheet model near a boundary to show how increased friction impacts locomotion kinematics. We finish by zooming in to the sub-cellular level and addressing the role played by surfaces on force and flow generation by cilia.

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Publisher: Cambridge University Press
Print publication year: 2020

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  • Self-Propulsion and Surfaces
  • Eric Lauga, University of Cambridge
  • Book: The Fluid Dynamics of Cell Motility
  • Online publication: 09 September 2020
  • Chapter DOI: https://doi.org/10.1017/9781316796047.015
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  • Self-Propulsion and Surfaces
  • Eric Lauga, University of Cambridge
  • Book: The Fluid Dynamics of Cell Motility
  • Online publication: 09 September 2020
  • Chapter DOI: https://doi.org/10.1017/9781316796047.015
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Self-Propulsion and Surfaces
  • Eric Lauga, University of Cambridge
  • Book: The Fluid Dynamics of Cell Motility
  • Online publication: 09 September 2020
  • Chapter DOI: https://doi.org/10.1017/9781316796047.015
Available formats
×