Underdamped modes in a hydrodynamically coupled microparticle system

Yao, A. M. and Keen, S. A. J. and Burnham, D. R. and Leach, J. and Di Leonardo, R. and McGloin, D. and Padgett, M. J. (2009) Underdamped modes in a hydrodynamically coupled microparticle system. New Journal of Physics, 11. 053007. ISSN 1367-2630 (https://doi.org/10.1088/1367-2630/11/5/053007)

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Abstract

When micron-sized particles are trapped in a linear periodic array, for example, by using optical tweezers, they interact only through the hydrodynamic forces between them. This couples the motion of the spheres and it has been predicted that an extended system might behave as an elastic medium that could support underdamped propagating waves. In practice, these underdamped modes can be observed only with massive particles in very stiff traps and very low viscosity fluids. We have been able to realize these conditions by trapping water droplets in air. Even with a system of just two particles we were able to observe the coupled oscillatory motion predicted: underdamping of the symmetric (collective) mode and overdamping of the asymmetric (relative) mode.

ORCID iDs

Yao, A. M. ORCID logoORCID: https://orcid.org/0000-0002-6260-5852, Keen, S. A. J., Burnham, D. R., Leach, J., Di Leonardo, R., McGloin, D. and Padgett, M. J.;
  • Item type:Article
    ID code:31000
    Dates:
    Date
    Event
    19 May 2009
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:13 May 2011 15:51
    Last modified:11 Nov 2024 09:44
    URI:https://strathprints.strath.ac.uk/id/eprint/31000
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