Hydrodynamic Coupling of Two Brownian Spheres to a Planar Surface

(2) Harvard University; (3) Massachusetts Institute of Techology); David G. Grier(1) ((1) University of Chicago; Eric R. Dufresne (1); Michael P. Brenner (3); Todd M. Squires (2)

arxiv: cond-mat/0003314 · v2 · submitted 2000-03-17 · ❄️ cond-mat.soft

Hydrodynamic Coupling of Two Brownian Spheres to a Planar Surface

Eric R. Dufresne (1) , Todd M. Squires (2) , Michael P. Brenner (3) , David G. Grier(1) ((1) University of Chicago , (2) Harvard University , (3) Massachusetts Institute of Techology) This is my paper

classification ❄️ cond-mat.soft

keywords spheressurfaceanalysisdiffusionflatnearasymmetrybehavior

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We describe direct imaging measurements of the collective and relative diffusion of two colloidal spheres near a flat plate. The bounding surface modifies the spheres' dynamics, even at separations of tens of radii. This behavior is captured by a stokeslet analysis of fluid flow driven by the spheres' and wall's no-slip boundary conditions. In particular, this analysis reveals surprising asymmetry in the normal modes for pair diffusion near a flat surface.

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Hydrodynamic Coupling of Two Brownian Spheres to a Planar Surface

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