A NEW 3-PARAMETER VISCOSITY-TEMPERATURE EQUATION FOR SATURATED LIQUIDS FROM THE TRIPLE POINT TO THE CRITICAL-POINT

A new simple viscosity-temperature equation with only three adjustable parameters is proposed that is valid over the entire saturated liquid curve for a chemically diverse set of compounds. This equation can in corporate the correct near-critical behavior and satisfies the need fo r a reliable equation for fitting and predicting the viscosity of satu rated liquids. It reproduces data within the experimental uncertainty over the entire saturated liquid region. Compared with the previous vi scosity-temperature equations, the new equation not only more accurate ly correlates experimental data but also more effectively extrapolates values from the usual range in which data are available both to the c ritical point and to the triple point. (C) 1997 Elsevier Science B.V.