Difference between revisions of "Hydronamic Coupling of Two Brownian Spheres"
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==[[Introduction]]== | ==[[Introduction]]== | ||
| + | This paper describes direct imaging measurements of the collective and relative diffusion of two colloidal spheres near a flat plate. The bounding surface modifies the spheres' dynamics and this behavior is captured by a stokeslet analysis of fluid flow driven by the spheres' and wall's no-slip boundary conditions. This reveals surprising asymmetry in the normal modes for pair diffusion near a flat surface. | ||
| − | ==[[ | + | ==[[Results]]== |
==[[Discussion]]== | ==[[Discussion]]== | ||
| + | Confiding surface can influence colloidal dynamics even at large separations, and that this three-surface coupling is accurately described by a leading-order stokeslet approximation. This results suggest that the same formalism can be applied to more general configurations of spheres and bounding surfaces. Wall-induced hydrodynamic interactions may influenced nonequilibrium optical tweezer measurements of confined colloidal interactions and may have contributed to the observed attractions between like-charged spheres. | ||
| + | |||
| + | not completed yet | ||
Revision as of 02:18, 14 November 2011
Contents
Reference
Eric R. Dufresne, Todd M. Squires, Michael P. Brenner, and David G. Grier, "Hydrodynamic Coupling of Two Brownian Spheres to a Planar Surface", Physical Review Letters 2000 85(15), 3317-3320
Introduction
This paper describes direct imaging measurements of the collective and relative diffusion of two colloidal spheres near a flat plate. The bounding surface modifies the spheres' dynamics and this behavior is captured by a stokeslet analysis of fluid flow driven by the spheres' and wall's no-slip boundary conditions. This reveals surprising asymmetry in the normal modes for pair diffusion near a flat surface.
Results
Discussion
Confiding surface can influence colloidal dynamics even at large separations, and that this three-surface coupling is accurately described by a leading-order stokeslet approximation. This results suggest that the same formalism can be applied to more general configurations of spheres and bounding surfaces. Wall-induced hydrodynamic interactions may influenced nonequilibrium optical tweezer measurements of confined colloidal interactions and may have contributed to the observed attractions between like-charged spheres.
not completed yet
