Metastability and Instability in the Lennard-Jones Fluid Investigated by Transition-Matrix Monte Carlo

Published

September 1, 2004

Author(s)

Vincent K. Shen, Jeffrey R. Errington

Abstract

Grand canonical transition-matrix Monte Carlo is used to investigate kinetic and thermodynamic stability limits of the liquid and vapor in the Lennard-Jones fluid. Kinetic spinodal are associated with a vanishing of the free energy barrier between metastable and stable states, and thermodynamic spindols are related to diverging. hermodynamic response functions. We show that the kinetically and thermodynamically defined spindols are conceptually equivalent view points in the case of the liquid-vapor transition. In agreement with the work of others, we find that the properties of the supersaturated vapor at its limit of stability approach their saturation values with increasing system size. We also find an analogous trend in the case of the superheated liquid. Finally, the computational algorithm and manipulation of data outlined in this work provide an intuitive and efficient method for determining thermophysical properties of stable and metastable fluids via molecular simulation.

Citation

Journal of Physical Chemistry B

Volume

108

Issue

No. 51

Pub Type

Journals

Keywords

metastability, Monte Carlo, simulation, spindol

Citation

Shen, V. and Errington, J. (2004), Metastability and Instability in the Lennard-Jones Fluid Investigated by Transition-Matrix Monte Carlo, Journal of Physical Chemistry B (Accessed April 24, 2024)