Abstract
High-pressure viscosities and densities of n-butane, n-pentane, n-hexane, and n-octane have been measured with a specially designed falling cylinder viscometer. Data cover the pressure range from 10 to 70 MPa at temperatures from 310 to 450 K. When the viscosity is plotted as a function of density, the data at all temperatures and pressures are shown to reduce to a single curve for each alkane. An exponential relationship of the form η = B 1 x exp(B 2xρ) + B 3 is used to describe the density dependence of viscosity. The logarithmic viscosity of the alkanes changes linearly with the inverse temperature at all pressures. The density shows a linear dependence on temperature.
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Kiran, E., Sen, Y.L. High-pressure viscosity and density of n-alkanes. Int J Thermophys 13, 411–442 (1992). https://doi.org/10.1007/BF00503880
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DOI: https://doi.org/10.1007/BF00503880