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- W2040257055 abstract "This paper reports results obtained from isothermal-isobaric molecular dynamics simulations of binary fluid mixtures composed of atoms and homonuclear diatomic molecules. Intermolecules. Intermolecular interactions between atoms are represented by the one-center Lennard-Jones potential and those between diatoms are represented by the two-center Lennard-Jones potential. Simulations are performed over a range of molecular elongation 0 ≤ Id = L/σd ≤ 0.8. Molecular size and energy parameters of the components are kept the same. Results are reported for density, internal energy, excess Gibbs free energy, excess enthalpy and excess volume of several equimolar mixtures at a temperature, kbT/εa = 0.92, and pressure Pσa3/εa = 0.5. Excess Gibbs free energy has been determined accurately using the reliable coupling parameter charging method. We show how thermodynamic properties respond to changes in molecular elongation. Also, we have used our simulation results to test a new version of the first-order perturbation theory of two-center Lennard-Jones fluid mixtures based on the nonspherical reference system. In this theory, correlation functions of the reference fluid mixture are approximated by those of the hard sphere mixture. It has been found that this version of the perturbation theory can describe density and internal energy up to ld = 0.8, and it can predict simulation results for excess properties accurately for ld < 0.6." @default.
- W2040257055 created "2016-06-24" @default.
- W2040257055 creator A5012195906 @default.
- W2040257055 date "1997-01-01" @default.
- W2040257055 modified "2023-09-26" @default.
- W2040257055 title "Thermodynamic properties of binary mixtures of atoms and diatomic molecules from computer simulation and perturbation theory" @default.
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- W2040257055 doi "https://doi.org/10.1016/s0378-3812(96)03159-7" @default.
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