Eigenmodes of a hydrodynamically coupled micron-size multiple-particle ring.

Eigenmodes of a hydrodynamically coupled micron-size multiple-particle ring. Research Abstract Details 

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Eigenmodes of a hydrodynamically coupled micron-size multiple-particle ring. Abstract Text:

R Di Leonardo,S Keen,J Leach,C D Saunter,G D Love,G Ruocco,M J Padgett,R Di Leonardo,S Keen,J Leach,C D Saunter,G D Love,G Ruocco,M J Padgett,

We use a continuous acquisition, high-speed camera with integrated centroid tracking to simultaneously measure the positions of a ring of micron-sized particles held in holographic optical tweezers. Hydrodynamic coupling between the particles gives a set of eigenmodes, each one independently relaxing with a characteristic decay rate (eigenvalue) that can be measured using our positional data. Despite the finite particle size, we find an excellent agreement between the measured eigenvalues and those numerically predicted by Oseen theory applied to the two-dimensional (2D) ring geometry. Particle motions are also analyzed in terms of the alternative eigenmode set obtained by wrapping onto the ring the eigenmodes of a 1D periodic chain. We identify the modes for which the periodic chain is a good approximation to the ring and those for which it is not.

Eigenmodes of a hydrodynamically coupled micron-size multiple-particle ring. Publishing Authors By Initials

R Di Leonardo,S Keen,J Leach,CD Saunter,GD Love,G Ruocco,MJ Padgett,R Di Leonardo,S Keen,J Leach,CD Saunter,GD Love,G Ruocco,MJ Padgett,

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Eigenmodes of a hydrodynamically coupled micron-size multiple-particle ring. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Physical review. E, Statistical, nonlinear, and so

VOLUME: 76

Page Numbers: 061402

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ISSN: 1539-3755

DAY: 26

MONTH: 12

YEAR: 2007

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LANGUAGE: eng

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AFFILIATION: INFM-CRS SOFT, c/o Universitá di Roma "La Sapienza," I-00185 Roma, Italy.

Country: United States

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MEDLINETA: Phys Rev E Stat Nonlin Soft Ma

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