The viscosity of argon at high densities

P.S. van der Gulik and N.J. Trappeniers

Physica A: Statistical Mechanics and its Applications, 1986, vol. 135, issue 1, 1-20

Abstract: The viscosity coefficient of argon has been measured at 174.45 K as a function of pressure from 161 up to 4707 bar, including the melting point at 4637 bar and one data point in the supercooled region. Use was made of a vibrating wire viscometer described in a previous paper. The reduced data have been compared with results obtained from molecular dynamics calculations and the agreement is found to be satisfactory. Following the Batschinski-Hildebrand representation it was found that the present results, as well as earlier reported data measured at higher temperatures, can be described by three different linear relations between the fluidity and the molar volume, corresponding to three adjacent volume ranges, covering half the experimental density range. A further analysis shows that, while at intermediate densities the viscosity may be described by the Enskog formalism, at higher densities the behaviour of η is markedly influenced by correlated motions of the molecules.

Date: 1986
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:135:y:1986:i:1:p:1-20

DOI: 10.1016/0378-4371(86)90103-2

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