Prediction of multicomponent liquid-mixture viscosity from binary thermodynamic data

A local composition model for multicomponent, nonaqueous, liquid mixture shear viscosity was developed and tested. Only binary equilibrium thermodynamic information is required in addition to pure component data; no mixture viscosity data and no adjustable parameters are used. Predictions were compared to experimental data obtained from the literature and in the laboratory yielding an average absolute percent deviation of 1.1% for In(eta v) for 47 binary systems consisting of 391 points over the entire composition range and 0.75% for seven ternary systems consisting of 63 data points.