Open AccessOn the Singularity of the Liquid-Gas Coexistence Curve Diameter
Author(s) -
Oleksandr Bakai,
M.I. Bratchenko,
S.V. Dyuldya
Publication year - 2020
Publication title -
ukrainian journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 17
eISSN - 2071-0194
pISSN - 2071-0186
DOI - 10.15407/ujpe65.9.802
Subject(s) - gravitational singularity , singularity , mesoscopic physics , amplitude , binodal , physics , critical point (mathematics) , scaling , asymmetry , phase (matter) , classical mechanics , condensed matter physics , mathematical analysis , geometry , mathematics , phase diagram , optics , quantum mechanics
A simplified Anisimov–Wang variant of the complete scaling approach makes it possible to determine the amplitudes of singularities for the diameter of the phase coexistence curve (CXC) on the basis of the coefficients in the power series expansion of the mean-field free energy in the reduced temperature and pressure near the critical point. This method is applied to obtain the amplitudes for the leading critical singularities of the CXC diameter in the case of a fluid described in the framework of the mesoscopic mean-field model. The results obtained demonstrate that the amplitudes of leading singularities of the CXC diameter are determined by the mesoscopic asymmetry parameters of the heterophase fluid.