Kinematic Shear Viscosity of Low-Molecular-Weight Liquids and Their Solutions

This work is devoted to discussing the kinematic shear viscosities of low-molecular-weight liquids, including atomic liquids of the argon type, their mixtures, liquids with dumbbell-like and ring-like molecules (such as nitrogen and benzene), water, monohydric alcohols from the methanol series, and aqueous solutions of methanol and ethanol. We show that applying the standard activation approach to these liquids presents insurmountable difficulties. Additionally, we establish that all of these liquids are characterized by averaged interparticle potentials that have an argon-like structure. As a result, the behavior of the shear viscosity in these liquids becomes similar to that in argon-like liquids. We also take into account the extended shape of the alcohol molecules. Special attention is focused on the shear viscosity of aqueous solutions of ethanol, demonstrating its strong dependence on contraction. A careful comparison with experimental data, which support our main assumptions, is provided.