The effect of Cu nanoparticles on the characteristics of vapor-liquid interface of argon at various saturated temperatures by molecular dynamic simulation

In this study, the effect of copper nanoparticles on the interface properties of liquid-vapor argon is investigated by molecular dynamics simulation. Stoddard Ford potential function has been utilized to estimate the interactions of argon-argon and argon-copper particles. Simulation is done in the nanoscale computational domain to phase change of vapor to liquid at different saturated temperatures. Density values and surface tension for different cutoff radii are obtained. It is demonstrated that in the rc=4 sigma\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$r_{\text{c}} = 4\sigma$$\end{document} calculated values are acceptable. Simulation results show that nanoparticles change the interface properties of liquid-vapor argon. With addition of nanoparticles, liquid density decreases and vapor density increases. Nanoparticles displace density distribution and cause fluctuations in the density profile. Also, surface tension increases with increase in nanoparticle concentration.