| Issue |
Europhys. Lett.
Volume 48, Number 4, November II 1999
|
|
|---|---|---|
| Page(s) | 397 - 402 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i1999-00496-6 | |
| Published online | 01 September 2002 | |
Theory of long-time wave number dependent diffusion coefficients in concentrated neutral colloidal suspensions
1
I. R. I. Delft University of Technology - 2629 JB Delft, The Netherlands
2
The Rockefeller University - New York, New York 10021, USA
Received:
19
April
1999
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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