Using a fluid cell model for description of a phase transition in simple liquid alkali metals

TL;DR

This paper presents a theoretical model using a cell fluid approach to describe phase transitions in liquid alkali metals, specifically sodium and potassium, without phenomenological parameters, and compares results with computer simulations.

Contribution

It introduces a parameter-free cell fluid model for phase transitions in liquid alkali metals, providing analytical expressions validated against simulations.

Findings

Accurately predicts phase transition points for sodium and potassium.

Provides analytical equations for the equation of state and coexistence curve.

Shows good agreement with computer simulation data.

Abstract

This article embraces a theoretical description of the first order phase transition in liquid metals with application of a cell fluid model. The results are obtained through calculation of the grand partition function without usage of phenomenological parameters. The Morse potential is used for calculation of the equation of state and the coexistence curve. Specific results for sodium and potassium are obtained. Comparison of outcome of analytical expressions with data of computer simulations is presented.