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An improved parametric crossover model for the thermodynamic properties of fluids in the critical region

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Abstract

An improved parametric equation for the thermodynamic properties of fluids is presented that incorporates the crossover from singular thermodynamic behavior in the immediate vicinity of the critical point to regular thermodynamic behavior far away from the critical point. Based on a comparison with experimental data for ethane and methane, it is demonstrated that the crossover model is capable of representing the thermodynamic properties of fluids in a large range of temperatures and densities around the critical point.

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Authors and Affiliations

  1. Institute for Oil and Gas Research of the Russian Academy of Sciences, Leninsky Prospect 65, 117917, Moscow, Russia

    S. B. Kiselev

  2. Institute for Physical Science and Technology, University of Maryland, 20742, College Park, Maryland, USA

    S. B. Kiselev & J. V. Sengers

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  1. S. B. Kiselev
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  2. J. V. Sengers
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Kiselev, S.B., Sengers, J.V. An improved parametric crossover model for the thermodynamic properties of fluids in the critical region. Int J Thermophys 14, 1–32 (1993). https://doi.org/10.1007/BF00522658

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