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Direct calculation of solid-liquid equilibria from density-of-states Monte Carlo simulations

J. Chem. Phys. 122, 124109 (2005); doi:10.1063/1.1874792

Published 31 March 2005

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Ethan A. Mastny and Juan J. de Pablo
Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706-1691
A density-of-states Monte Carlo method is proposed for simulations of solid-liquid phase equilibria. A modified Wang–Landau density-of-states sampling approach is used to perform a random walk in regions of potential energy and volume relevant to solid-liquid equilibrium. The method provides a direct estimate of the relative density of states [Omega(U,V)] and thus the relative free energy within these regions, which is subsequently used to determine portions of the melting curve over wide ranges of pressure and temperature. The validity and usefulness of the method are demonstrated by performing crystallization simulations for the Lennard-Jones fluid and for NaCl. ©2005 American Institute of Physics
History: Received 19 November 2004; accepted 26 January 2005; published 31 March 2005
Permalink: http://link.aip.org/link/?JCPSA6/122/124109/1
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KEYWORDS and PACS

Keywords
PACS
  • 64.70.Dv
    Solid–liquid transitions
  • 61.20.Ja
    Computer simulation of liquid structure
  • 65.20.+w
    Thermal properties of liquids: heat capacity, thermal expansion, etc
  • 65.40.Gr
    Entropy and other thermodynamical quantities of crystalline solids
  • YEAR: 2005

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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