Reference correlations for the viscosity and thermal conductivity of fluids over extended range of conditions: n-hexane in the vapor, liquid, and supercritical regions

Published

March 11, 2015

Author(s)

Richard A. Perkins, Marcia L. Huber, Marc J. Assael, Efthimia K. Mihailidou, Sofia K. Mylona, Evita J. Sykioti

Abstract

This article summarizes the correlation procedures developed for IUPAC Project 2012-040-1-100 (Reference correlations for the thermal conductivity and viscosity of fluids over extended range of conditions (vapor, liquid and supercritical region)). This project is focused on the development of wide-range reference correlations for the thermal conductivity and viscosity of fluids that incorporate as much theoretical knowledge of these properties as possible. The thermal conductivity and viscosity correlations developed here for pure fluids are functions of temperature and density. The best available equations of state for a given fluid are used to calculate the thermodynamic properties required for these correlations, often from measured temperatures and pressures. The correlation methodology developed during this project has been applied to n-hexane in this report but can be applied to any pure fluid with a reliable equation of state and reliable data for the thermal conductivity and viscosity over a significant range of temperatures and densities.

Citation

Pure and Applied Chemistry

Volume

87

Issue

3

Pub Type

Journals

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Keywords

critical evaluation, correlation, n-hexane, thermal conductivity, transport properties, viscosity

Citation

Perkins, R. , Huber, M. , Assael, M. , Mihailidou, E. , Mylona, S. and Sykioti, E. (2015), Reference correlations for the viscosity and thermal conductivity of fluids over extended range of conditions: n-hexane in the vapor, liquid, and supercritical regions, Pure and Applied Chemistry, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914943 (Accessed October 8, 2025)