We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Evaluation of the pressure tensor and surface tension for molecular fluids with discontinuous potentials using the volume perturbation method.
- Authors
Jiménez-Serratos, Guadalupe; Vega, Carlos; Gil-Villegas, Alejandro
- Abstract
In this article we apply the volume-perturbation method to systems of particles interacting via discontinuous potentials. We have found that an accurate Monte Carlo simulation protocol can be used in order to study properties of very general non-spherical systems with discontinuous potentials, such as chain molecules and spherocylinders with square-well interactions, and chain molecules with square-well and square-shoulder interactions. From the simulation results obtained for these systems we verify that: (1) the method reproduces the pressure as used in NPT simulations; (2) discontinuous infinite repulsive interactions give asymmetric contributions to the pressure when compression and expansion movements are used; however for finite interactions these contributions are symmetric; and (3) the pressure contributions preserve the additivity of the potential interactions. Density profiles and surface tension for subcritical conditions are accurately predicted.
- Publication
The Journal of chemical physics, 2012, Vol 137, Issue 20, p204104
- ISSN
1089-7690
- Publication type
Journal Article
- DOI
10.1063/1.4767375