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Depletion and ''fines'' effects on transport in hard-sphere colloids

Lue, Leo and Woodcock, Leslie V. (2002) Depletion and ''fines'' effects on transport in hard-sphere colloids. International Journal of Thermophysics, 23 (4). pp. 937-947.

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Abstract

The effect of depletion forces induced by the presence of much smaller B spheres (diameter ratio 10/1) in dense hard A spheres has been investigated. Simulations for systems of 10(4) spheres with mole fraction of larger spheres x(A) = 0.05 and with total sphere volume fraction from 0.35 to 0.655 have been carried out. The depletion force steeply increases in the A-A pair distribution function at contact, and creates a lower first coordination and more open network A-structures. There is no evidence of demixing. It is found that in the amorphous solid region there is an enhanced diffusive mobility of the larger spheres, relative to that of pure spheres, at the same densification rates. This observation resembles the "fines" effect that occurs in colloidal suspensions and granular fluids.

Item type: Article
ID code: 38485
Keywords: hard-sphere colloids , depletion forces , fines effect , computer simulation, Physical and theoretical chemistry, Physics
Subjects: Science > Chemistry > Physical and theoretical chemistry
Science > Physics
Department: Faculty of Engineering > Chemical and Process Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 13 Mar 2012 16:37
    Last modified: 04 Oct 2012 13:17
    URI: http://strathprints.strath.ac.uk/id/eprint/38485

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