Modified Entropy Scaling of the Transport Properties of the Lennard-Jones Fluid

Overview

Journal J Phys Chem B

Publisher American Chemical Society

Specialty Chemistry

Date 2019 Jun 27

PMID 31241958

Citations 13

Authors

Ian H Bell

Richard Messerly

Monika Thol

Lorenzo Costigliola

Jeppe C Dyre

Affiliations

Soon will be listed here.

Abstract

Rosenfeld proposed two different scaling approaches to model the transport properties of fluids, separated by 22 years, one valid in the dilute gas, and another in the liquid phase. In this work, we demonstrate that these two limiting cases can be connected through the use of a novel approach to scaling transport properties and a bridging function. This approach, which is empirical and not derived from theory, is used to generate reference correlations for the transport properties of the Lennard-Jones 12-6 fluid of viscosity, thermal conductivity, and self-diffusion. This approach, with a very simple functional form, allows for the reproduction of the most accurate simulation data to within nearly their statistical uncertainty. The correlations are used to confirm that for the Lennard-Jones fluid the appropriately scaled transport properties are nearly monovariate functions of the excess entropy from low-density gases into the supercooled phase and up to extreme temperatures. This study represents the most comprehensive metastudy of the transport properties of the Lennard-Jones fluid to date.

Citing Articles

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