Transport Properties of Ar-Kr Mixtures: A Molecular Dynamics Simulation Study

Bulletin of the Korean chemical society

Song Hi Lee¹  Sun Hong Min¹  Chang Mo Son¹ 

关键词: Diffusion;    Shear viscosity;    Thermal conductivity;    Ar-Kr mixtures;    Molecular dynamics simulation;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Equilibrium molecular dynamics (EMD) simulations are used to evaluate the transport coefficients of argonkrypton mixtures at two liquid states (state A: 94.4 K and 1 atm; state B: 135 K and 39.5 atm) via modified Green-Kubo formulas. The composition dependency of the volume at state A obeys close to the linear model for ideal liquid mixture, while that at state B differs from the linear model probably due to the high pressure. The radial distribution functions for the Ar-Kr mixture (x = 2/3) show a mixing effect: the first peak of g11 is higher than that of g(r) for pure Ar and the first peak of g22 is lower than that of g(r) for pure Kr. An exponential model of engineering correlation for diffusion coefficient (D) and shear viscosity (�?) is superior to the simple linear model for ideal liquid mixtures. All three components of thermal conductivity (�?_pm, �?_tm, and �?_ti) at state A and hence the total thermal conductivity decrease with the increase of x. At state B, the change in ルtm is dominant over those in �?_pm and �?_ti, and hence the total thermal conductivity decrease with the increase of x.

【 授权许可】

Unknown