Application of the Hildebrand Fluidity Equation to Liquid Mixtures
The Hildebrand fluidity equation [Φ = B( V̄ - V̄0)V̄0] has been applied to simple binary and ternary systems, using the following mixing rules: V̄ = σiXiV̄l°, V̄0 = σXiV̄0i, BV̄ = (B1V̄1°)v1 (B2V̄2°)v2⋯ in which V̄i° is the molar volume of a pure liquid, V̄0i is the limiting molar volume of a pure liquid, and v, is a volume fraction. These mixing rules allow prediction of the viscosities of mixtures from the properties of the pure liquids, with a maximum deviation of 10% in the 11 binary and 2 ternary systems considered. These predictions are shown to be comparable to, or better than, the best predictions of four commonly used “zero parameter” equations for viscosities of mixtures.
G. L. Bertrand, "Application of the Hildebrand Fluidity Equation to Liquid Mixtures," Industrial and Engineering Chemistry Fundamentals, American Chemical Society (ACS), Jan 1977.
The definitive version is available at https://doi.org/10.1021/i160064a020
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© 1977 American Chemical Society (ACS), All rights reserved.