A Description of Thermal Conductivity and Dynamic Viscosity of Water in the Critcal Region

Abstract

The purpose of this study was to establish reasonable estimates of the values of thennal conductivity and dynamic viscosity of water in the critical region» This was accomplished by reviewing the literature and utilizing available experimental measurements» The validity of the estimates was strengthened by the use of the principle of corresponding states after other considerations failed to contribute a description of these two transport properties in the critical region» The final results were expressions of a thennal conductivity excess and dynamic viscosity excess as unique functions of density^ NCMENCLATURE The following nonenclature is used in this reports BgC Yirial coefficients. bjC^m Constants* k Thennal conductivity, p Pressuree R Gas constant. T Temperature« V Specific volune. Z Compressibility factor^ A Density, M %naj!iic viscosity, c Subscript denoting the critical value« o Subscript denoting the value at one atmosphere pressure^ thus^ the quantity is a function of tanperature only, (k-kg) k (p,T)-k (T) ^ thermal conductivity excess.