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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 28, Number 10
BKCSDE 28(10)
October 20, 2007

Title	Transport Properties of Ar-Kr Mixtures: A Molecular Dynamics Simulation Study
Author	Sun Hong Min, Chang Mo Son, Song Hi Lee*
Keywords	Diffusion, Shear viscosity, Thermal conductivity, Ar-Kr mixtures, Molecular dynamics simulation
Abstract	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 (η) is superior to the simple linear model for ideal liquid mixtures. All three components of thermal conductivity (λ_pm, λ_tm, and λ_ti) at state A and hence the total thermal conductivity decrease with the increase of x. At state B, the change in λtm is dominant over those in λ_pm and λ_ti, and hence the total thermal conductivity decrease with the increase of x.
Page	1689 - 1696
Full Text	PDF

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