Contents - Index



The acentric factor, w, is a thermodynamic property of a fluid that is commonly used in property correlations.  It is defined by


w = -1.0 - log10(Psat/Pcrit)



Psat is the vapor pressure of the fluid at a temperature equal to 0.7 * Tcrit

Pcrit is the critical pressure

Tcrit is the critical temperature [R or K]



Thermophysical Property Functions