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RESEARCH PAPERS

A Fluidity-Temperature Relationship for Liquids

[+] Author and Article Information
T. F. Ford, C. R. Singleterry

Naval Research Laboratory, Washington, D. C.

J. of Lubrication Tech 95(2), 236-241 (Apr 01, 1973) (6 pages) doi:10.1115/1.3451780 History: Received March 24, 1972; Online October 18, 2010

Abstract

Many relationships between viscosity or its reciprocal, fluidity, and temperature have been proposed for liquids. None except the empirically modified ASTM chart have proven satisfactory over extended temperature ranges. We here note that by plotting the kinematic fluidity (φkin ) against the square of the absolute temperature (deg K 2 ) we obtain linear relationships for a wide variety of organic liquids at kinematic viscosities less than about 1.67 centistokes (or fluidities above about 0.60 reciprocal centistokes). The generality of the relationship appears to justify the use of the equation,

φkin = a + bT2,
as an interpolation formula for organic liquids in the low viscosity region.

Copyright © 1973 by ASME
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