Optimal packing of polydisperse hard-sphere fluids

Details Optimal packing of polydisperse hard-sphere fluids Optimal packing of polydisperse hard-sphere fluids

1998-11-29

arxiv.org/abs/cond-mat/9811404v1

Journal of Chemical Physics 110, 5318 (1999).

Physics

Condensed Matter

Soft Condensed Matter

21 pages, 6 figures, RevTex (Submitted to J. Chem. Phys.)

Scientific paper

10.1063/1.478426

We consider the effect of intermolecular interactions on the optimal size-distribution of $N$ hard spheres that occupy a fixed total volume. When we minimize the free-energy of this system, within the Percus-Yevick approximation, we find that no solution exists beyond a quite low threshold ($\eta \thickapprox 0.260$). Monte Carlo simulations reveal that beyond this density, the size-distribution becomes bi-modal. Such distributions cannot be reproduced within the Percus-Yevick approximation. We present a theoretical argument that supports the occurrence of a non-monotonic size-distribution and emphasizing the importance of finite size effects.

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