1202.4260 (S. Hlushak et al.)

Improved first order mean spherical approximation for simple fluids    [PDF]

S. Hlushak, A. Trokhymchuk, I. Nezbeda

A perturbation approach based on the first-order mean spherical approximation
(FMSA) is proposed. It consists in adopting a hard-sphere plus short-range
attractive Yukawa fluid as the novel reference system, over which the
perturbative solution of the Ornstein-Zernike equation is performed. A choice
of the optimal range of the reference attraction is discussed. The results are
compared against conventional FMSA/HS theory and Monte-Carlo simulation data
for compressibility factor and vapor-liquid phase diagrams of the medium-ranged
Yukawa fluid. Proposed theory keeps the same level of simplicity and
transparency, as the conventional FMSA/HS approach does, but shows to be more
accurate.

View original: http://arxiv.org/abs/1202.4260