Nonlinear Phenomena in Complex Systems, 1998, Vol.1, No.1-4, pp.28-32

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

1998, Volume 1, Number 1-4, pp.28-32

Quasichemical Approximation for Consolidation Site Transformation of Lattice Gas System.
G.S. Bokun, V.S. Vikhrenko, V.A. Zhuk, V.A. Tsurko

The method for improvement of the quasichemical approximation is developed. The consolidated lattice consisted of complex sites that include all states of regular blocks of the initial lattice is introduced. Based on the quasichemical approximation on the consolidated lattice the expressions for thermodynamic functions and probabilities for occupation of lattice sites by particles are derived. Computations for the two-dimensional square lattice with attractive nearest neighbor interparticle interaction have shown the significant improvement of the results with increasing the block's size.

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