General theory of tracer-diffussion in colloidal suspensions

M. Hernández-Contreras, M. Medina-Noyola and A. Vizcarra-Rendón

Physica A: Statistical Mechanics and its Applications, 1996, vol. 234, issue 1, 271-310

Abstract: In this work we derive a generalized Langevin equation that describes the translational Brownian motion of a tracer particle which interacts with other diffusing particles in the system. The direct interactions of the tracer with these other diffusing particles give rise to memory effects described by a time-dependent friction. The main result of this work is a general and exact expression for this friction function which admits the possibility that the tracer is non-spherical, and that the particles diffusing around it are not of a single species, although they are assumed spherical.

Keywords: Colloidal suspension; Brownian motion; Langevin equation; Tracer-diffusion (search for similar items in EconPapers)
Date: 1996
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:234:y:1996:i:1:p:271-310

DOI: 10.1016/S0378-4371(96)00296-8

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