Pair Correlation Function of the Equilibrium Critical State of Fluids on a Mesoscopic Length Scale

被引：0

作者：

Chaikina, Yu. A. ^{[1
]}

Vetchinkin, A. S. ^{[1
]}

Golubkov, M. G. ^{[1
]}

Lundin, A. A. ^{[1
]}

Rodionov, I. D. ^{[1
]}

Shushin, A. I. ^{[1
]}

Umanskii, S. Ya. ^{[1
]}

机构：

[1] Russian Acad Sci, Semenov Fed Res Ctr Chem Phys, Moscow, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2024年 / 18卷 / 08期

关键词：

critical phenomena; pair correlation function; scale transformations; scale invariance; optical diagnostics of critical state of fluids; CRITICAL-POINT; DENSITY; PREDICTION; BEHAVIOR; MODEL;

D O I：

10.1134/S1990793124701331

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

In this paper, the "fluctuation theorem" was solved for the first time in a direct way on the mesoscopic length scale. An analytical expression was obtained for the pair correlation function of the critical state of the fluid; the parameter of the function is the density variance, which is easily reconstructed from optical experiments. Comparison of the obtained result with the Ornstein-Zernike pair correlation function made it possible to determine the Fisher correction eta = 0.25, which increases the convergence. It was shown that the obtained results provide a reliable theoretical basis for optical diagnostics of the statistical state of critical fluids.

引用

页码：1795 / 1806

页数：12