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Molecular dynamics of a dense fluid of polydisperse hard spheres

Sear, RP (2000) Molecular dynamics of a dense fluid of polydisperse hard spheres Journal of Chemical Physics v, 113. p4732-4739.

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Slow dynamics in a fluid are studied in one of the most basic systems possible: polydisperse hard spheres. Monodisperse hard spheres cannot be studied as the slow down in dynamics as the density is increased is preempted by crystallisation. As the dynamics slow they become more heterogeneous, the spread in the distances traveled by different particles in the same time increases. However, the dynamics appears to be less heterogeneous than in hard-sphere-like colloids at the same volume fraction. The particles which move least far in a characteristic relaxation time and, particularly, the particles which move farthest in the same time are clustered, not randomly distributed throughout the sample. We study the dynamics at three different widths of the distribution of diameters of the hard spheres. For each width, the relaxation time is the same function of the compressibility factor, suggesting that this determines the relaxation time for hard spheres.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Date : 13 April 2000
DOI : 10.1063/1.1288804
Uncontrolled Keywords : cond-mat.soft, cond-mat.soft
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 11:27
Last Modified : 24 Jan 2020 20:52

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