Liquid-vapour transition of the long range Yukawa fluid

Abstract

Two liquid state theories, the self-consistent Ornstein-Zernike equation (SCOZA) and the hierarchical reference theory (HRT) are shown, by comparison with Monte Carlo simulations, to perform extremely well in predicting the liquid-vapour coexistence of the hard core Yukawa (HCY) fluid when the interaction is long range. The long range of the potential is treated in the simulations using both an Ewald sum and hyperspherical boundary conditions. In addition, we present an analytical optimised mean field theory which is exact in the limit of an infinitely long range interaction. The work extends a previous one by Caccamo et al [Phys. Rev. E,60, 5533 (1999)] for short range interactions.

30 pages, 5 figures

References in corpus (4)

• Critical behavior in colloid-polymer mixtures: theory and simulation
• Non-Perturbative Renormalization Group for Simple Fluids
• Self-consistent Ornstein-Zernike approximation for molecules with soft cores
• Soft core thermodynamics from self-consistent hard core fluids

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• Perturbation theory for very long-range potentials
• Global isomorphism approach: attractive Yukawa fluid, 2D case