(267d) A Novel Method for Correlating and Extrapolating Liquid Viscosity from Near the Melting Point to Near the Critical Point Using a Model Based on a Cotangent Function.

Liquid viscosity is an important thermophysical property in both scientific and industrial applications. This study proposes a new method of extrapolation using a model based on a cotangent function. The approach to this new method focuses on the qualitative aspects of liquid viscosity correlations as a function of temperature. This method can work with a broad range of chemicals and families. Extrapolation requires limited data near the melting point of most compounds and proves adequate to temperature regions near the critical point. The simplicity of the method makes it ideal. Where other extrapolation methods rely on experimental data near the boiling point or complicated formulas that rely on empirical data, this method simply uses 3-4 regressed parameters and molecular weight. The method can also be used to determine the reliability of experimental data when comparing similar compounds or compounds within the same family. The versatility and applicability of this method make it a valuable tool when extrapolating or predicting liquid viscosity.