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Journal of Nonlinear Science

, Volume 25, Issue 5, pp 1141–1152 | Cite as

Pursuit and Synchronization in Hydrodynamic Dipoles

  • Eva KansoEmail author
  • Alan Cheng Hou Tsang
Article

Abstract

We study theoretically the behavior of a class of hydrodynamic dipoles. This study is motivated by recent experiments on synthetic and biological swimmers in microfluidic Hele-Shaw type geometries. Under such confinement, a swimmer’s hydrodynamic signature is that of a potential source dipole, and the long-range interactions among swimmers are obtained from the superposition of dipole singularities. Here, we recall the equations governing the positions and orientations of interacting asymmetric swimmers in doubly periodic domains and focus on the dynamics of pairs of swimmers. We obtain two families of “relative equilibria”-type solutions that correspond to pursuit and synchronization of the two swimmers. Interestingly, the pursuit mode is stable for large-tail swimmers, whereas the synchronization mode is stable for large-head swimmers. These results have profound implications on the collective behavior reported in several recent studies on populations of confined microswimmers.

Keywords

Hydrodynamic interactions Confined microswimmers Stability analysis 

Mathematics Subject Classification

76Z10 76B99 

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Aerospace and Mechanical EngineeringUniversity of Southern CaliforniaLos AngelesUSA

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