Analytic Calculation of the Critical Temperature and Estimation of the Critical Region Size for a Fluid Model

IF 0.6 Q4 PHYSICS, MULTIDISCIPLINARY Ukrainian Journal of Physics Pub Date : 2023-10-20 DOI:10.15407/ujpe68.9.601
I.V. Pylyuk, M.P. Kozlovskii, O.A. Dobush
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引用次数: 1

Abstract

An analytic procedure for calculating the critical temperature and estimating the size of the critical region for a cell fluid model is developed. Our numerical calculations are illustrated by the case of the Morse potential parameters characterizing the alkali metals (sodium and potassium). The critical temperatures found for liquid sodium and potassium as solutions of the resulting quadratic equation agree with experimental data. The expression for the relative temperature determining the critical region size is obtained proceeding from the condition for the critical regime existence. In the cases of sodium and potassium, the value of this temperature is of the order of a few hundredths.
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流体模型临界温度的解析计算及临界区域大小的估计
提出了一种计算细胞流体模型临界温度和估计临界区域大小的解析方法。我们的数值计算用碱金属(钠和钾)的摩尔斯势参数的例子来说明。所得到的二次方程解为液态钠和液态钾的临界温度与实验数据吻合。从临界区存在的条件出发,得到了相对温度决定临界区大小的表达式。在钠和钾的情况下,这个温度的值是百分之几的数量级。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ukrainian Journal of Physics
Ukrainian Journal of Physics PHYSICS, MULTIDISCIPLINARY-
CiteScore
1.20
自引率
20.00%
发文量
244
期刊介绍: Ukrainian Journal of Physics is the general physics edition of the Department of Physics and Astronomy of the National Academy of Sciences of Ukraine. The journal publishes original papers and reviews in the fields of experimental and theoretical physics.
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