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Finite-size scaling for near-critical continuum fluids at constant pressure

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  • Wilding, N.B.
  • Binder, K.

Abstract

We consider the application of finite-size scaling methods to isothermal-isobaric (constant-NpT) simulations of pure continuum fluids. A finite-size scaling ansatz is made for the dependence of the relevant scaling operators on the particle number. To test the proposed scaling form, constant pressure simulations of the Lennard-Jones fluid at its liquid-vapour critical point are performed. The critical scaling operator distributions are obtained and their scaling with particle number is found to be consistent with the proposed behaviour. The forms of these scaling distributions are shown to be identical to their Ising model counterparts. The relative merits of employing the constant-NpT and grand canonical (constant-μVT) ensembles for simulations of fluid critically are also discussed.

Suggested Citation

  • Wilding, N.B. & Binder, K., 1996. "Finite-size scaling for near-critical continuum fluids at constant pressure," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 231(4), pages 439-447.
    • Handle: RePEc:eee:phsmap:v:231:y:1996:i:4:p:439-447
    DOI: 10.1016/0378-4371(96)00213-0
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