Fluid mixtures of parallel hard cubes

Details Fluid mixtures of parallel hard cubes Fluid mixtures of parallel hard cubes

1996-04-09

arxiv.org/abs/cond-mat/9604047v1

Physics

Condensed Matter

4 pages, 1 Postscript figure, uses RevTex and epsf.sty, to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.76.3742

The direct correlation function of a fluid mixture of parallel hard cubes is obtained by using Rosenfeld's fundamental measure approximation. This approximation is thermodynamically consistent (compressibility and virial equations of state are equal) and predicts a spinodal instability of the binary mixture for large-to-small side ratio larger than roughly 10, in qualitative agreement with simulations on the lattice version of the model. In two dimensions the system never demix, also in agreement with the simulations.

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