The equation of state of hard-spherocylinder fluid mixtures
文献情報
Luís E. S. de Souza, Sylvio Canuto
This work reports the density dependence of the compressibility factor of fifty binary mixtures of prolate spherocylinders, obtained by Monte Carlo simulation. The results are combined with other simulation results, including those for the pure fluid, to test existing equations of state (EOS) for the mixture. Best results are obtained with the EOS by Pavlíček and co-workers (T. Boublík and I. Nezbeda, Collect. Czech. Chem. Commun., 1986, 51, 2301, eqn. 5.79). We suggest a modification in this EOS, which improves its accuracy. At the same time, the new EOS still reduces to the Boublík-Mansoori-Carnahan-Starling equation of state for the particular case of hard-sphere mixtures. The proposed EOS is able to reproduce with good accuracy the compressibility factor of binary mixtures with 1 ≤ γ ≤ 4, where γ is the ratio of maximum length to breadth of each species, and with a ratio of the largest spherocylinder volume to the smallest one of up to 10.
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