Based on Eyrings theory of viscosity of pure liquids

an equation for the calculation of the viscosity of liquid mixtures was proposed from the concept of local molar composition: where V represents the viscosity

V molar volume

ga interaction energy between the molecules of the same kind

ga interaction energy between the molecules of the defferent kinds

n

R

T

x have their conventional meaning

and the subscripts i

j denote -component and j-component respectively. By the use of this equation

thirty binary systems and five ternary systems were tested with satisfactory agreement between calculated and experimental values. This equation is

therefore

valid both for correlate viscosities of binary systems and predict those of multicomponent systems from binary parameters.