Volume 48, Number 4, November II 1999
|Page(s)||397 - 402|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 September 2002|
Theory of long-time wave number dependent diffusion coefficients in concentrated neutral colloidal suspensions
I. R. I. Delft University of Technology - 2629 JB Delft, The Netherlands
2 The Rockefeller University - New York, New York 10021, USA
Accepted: 9 September 1999
We present for the first time a theory for the long-time wave number (k-) dependent collective and self-diffusion coefficients and , respectively, of neutral colloidal suspensions at high volume fractions ϕ. This theory is based on the Smoluchowski equation with mean-field–like hydrodynamic interactions, cage-diffusion and is free of adjustable parameters. The results provide a molecular interpretation of the experiments by Segrè et al. (Segrè P. N. and Pusey P. N., Phys. Rev. Lett., 77 (1996) 771), who recently measured of a concentrated neutral colloidal suspension.
PACS: 47.10.+g – Fluid dynamics: General theory / 82.70.Dd – Colloids / 83.10.Ff – Continuum mechanics
© EDP Sciences, 1999
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