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Chinese Journal of High Pressure Physics  > 2003  >  17(3): 173-179 .
CHEN Qi-Feng, CAI Ling-Cang, CHEN Dong-Quan, JING Fu-Qian, ZHAO Xian-Geng. Study of Equation of State of the Dense Fluid He+H2 Mixtures[J]. Chinese Journal of High Pressure Physics, 2003, 17(3): 173-179 . doi: 10.11858/gywlxb.2003.03.003
Citation: CHEN Qi-Feng, CAI Ling-Cang, CHEN Dong-Quan, JING Fu-Qian, ZHAO Xian-Geng. Study of Equation of State of the Dense Fluid He+H2 Mixtures[J]. Chinese Journal of High Pressure Physics, 2003, 17(3): 173-179 . doi: 10.11858/gywlxb.2003.03.003
shu

Study of Equation of State of the Dense Fluid He+H2 Mixtures

doi: 10.11858/gywlxb.2003.03.003
  • 1.

    National Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;

  • 2.

    Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621900, China

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  • Corresponding author: CHEN Qi-Feng
  • Received Date: 05 Nov 2002
  • Rev Recd Date: 02 Jan 2003
  • Publish Date: 05 Sep 2003
    Abstract
  • The mixing rule and the variational perturbation theory together with van der Waals one-fluid model have been used to study the equation of state of the dense fluid He+H2 mixtures with different H2∶He compositions in this work. The first-order quantum correction is included. To test the model and computational code, the isotherm of the fluid He+H2 mixtures at 300 K is calculated by using the existing -exp-6 optimization potential parameters. The calculated isotherm for the fluid He+H2 mixtures is in agreement with the experimental data and molecular dynamics simulations. Then the equation of state of the fluid He+H2 mixtures with different He∶H2 (He∶H2=1∶1, 1∶3, 3∶1) compositions have been further investigated in the pressure range 0~60 GPa and temperature in the range 50~7 000 K. Comparisons of the present results with Monte-Carlo simulations indicate that the quantum corrections for the calculation of the thermodynamic properties become significant at lower temperatures.

     

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