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Several correlations between viscosity and surface tension for saturatednormal fluids have been proposed in the literature. Usually, they include threeor four adjustable coefficients for every fluid and give generally goodresults. In this paper we propose a new and improved four-coefficientcorrelation which was obtained by fitting data ranging from the triple point toa point very near to the critical one. Fifty four substances were considered,including simple fluids (such as rare gases), simple hydrocarbons,refrigerants, and some other substances such as carbon dioxide, water orethanol. The new correlation clearly improves the results obtained with thosepreviously available since it gives absolute average deviations below1% for 40substances and below 2.1% for 10 substances more.

Improved Correlation for Viscosity from Surface Tension Data for Saturated Normal Fluids