A new model for the viscosity of liquid short chain (C1-C4) 1-alcohols over density and temperature based on Lennard-Jones potential

This work attempts to develop a new model for the viscosity of liquid short chain (C1-C4) 1-alcohols based on the Lennard-Jones potential. The model derived a novel equation as the mixed power and exponential function of density and temperature. When the Lennard-Jones potential took the (11.91-6) pattern, the derived equation was found in good agreement with reliable experimental data reported in literature. The R squared for the equation fitting to the 279 gathered data points that distributed in the ranges: 223.15-476.2 K and 0.1-472.8 MPa, was ≥ 0.9973. Comparing to other famous theoretical models mentioned, the new model was accurate, simpler, and had theory background and physical meanings for the main terms. All these advantages suggested the success of the developed new model and showed its practical application potentials in the industry associating the alcohols.