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Theoretical and analytical radial distribution function for dense fluids

Author

Listed:
  • Zhao, Yueqiang
  • Wu, Zhengming
  • Liu, Weiwei

Abstract

The ‘identical particles in quasi-mean potential energy field’ assumption was used to derive the approximate theoretical and analytical radial distribution function (RDF) for dense fluids through solving the two-body Schrödinger equation and using the first-order perturbation method. The theoretical and analytical expressions of RDF can save much computation time in calculating the thermodynamics properties of fluids and may make the statistical mechanics theories comparable with the equation of state method that is currently widely used in physics, chemistry and technology. The calculated properties for argon by this RDF fit well with the experimental data of reference over a very wide range of conditions, including dense fluids (liquid phase and dense gas), critical point, and dilute gas, in which the pair potential and the Axilrod–Teller three body interaction were considered. The extensive practical application of this model for science and technology needs further investigation.

Suggested Citation

  • Zhao, Yueqiang & Wu, Zhengming & Liu, Weiwei, 2010. "Theoretical and analytical radial distribution function for dense fluids," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 389(21), pages 5007-5021.
  • Handle: RePEc:eee:phsmap:v:389:y:2010:i:21:p:5007-5021
    DOI: 10.1016/j.physa.2010.07.002
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