Theoretical scheme for the shear viscosity of Lennard-Jones fluids

The Journal of Chemical Physics
M Robles, L I Uruchurtu

Abstract

We use the shear viscosity expression from the Enskog theory of dense gases in a perturbative scheme for the Lennard-Jones (LJ) fluid. This perturbative scheme is formulated by combining the analytic rational function approximation method of Bravo Yuste and Santos [Phys. Rev. A 43, 5418 (1991)] for the radial distribution function of hard-sphere fluids and the well known Mansoori-Canfield/Rasaiah-Stell perturbation theory to determine an effective diameter for the LJ fluid. The scheme is reliable on a wide range of temperatures and densities, and is very accurate around the critical point. Using this information, we build an accurate empirical formula for the shear viscosity in the liquid phase, which fits the recent data [K. Meier et al., J. Chem. Phys. 121, 3671 (2004)] in the whole simulation range.

References

May 15, 1991·Physical Review. a·S B Yuste, A Santos
Aug 12, 2004·The Journal of Chemical Physics·Karsten MeierStephan Kabelac
Nov 13, 2004·The Journal of Chemical Physics·Karsten MeierStephan Kabelac

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Citations

Jan 26, 2007·The Journal of Chemical Physics·Kippi M DyerGeorge Stell
Apr 28, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Guillaume Galliero, Christian Boned

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