Diffusion of concentrated neutral hard-sphere colloidal suspensions

Journal Article · Wed Mar 01 00:00:00 EST 2000 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PhysRevE.61.2967· OSTI ID:20215739

Verberg, R ^[1]; Schepper, I M. de ^[1]; Cohen, E G. D. ^[2]

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1. IRI Delft University of Technology, 2629 JB Delft (Netherlands)
2. The Rockefeller University, New York, New York 10021 (United States)

We evaluate theoretical expressions for the long-time wave-number-dependent self-diffusion and collective diffusion coefficients D{sub S}{sup L}(k,{phi}) and D{sup L}(k,{phi}), respectively, as a function of volume fraction {phi} and wave vector k for neutral monodisperse hard-sphere colloidal suspensions over the entire fluid range. The theory is based on the Smoluchowski equation with mean-field-like hydrodynamic interactions, cage diffusion, and is free of adjustable parameters. The basic physical mechanisms underlying our formulas are discussed and the results are compared with recent experimental results by Segre and Pusey [Phys. Rev. Lett. 77, 771 (1996)]. (c) 2000 The American Physical Society.

• OSTI ID: 20215739
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 61, Issue 3; Other Information: PBD: Mar 2000; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SUSPENSIONS
HARD-SPHERE MODEL
DIFFUSION
SELF-DIFFUSION
THEORETICAL DATA