Open AccessQualitative Properties of the Shear Viscosity of Liquids
Author(s) -
V. M. Makhlaichuk
Publication year - 2018
Publication title -
ukrainian journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 17
eISSN - 2071-0194
pISSN - 2071-0186
DOI - 10.15407/ujpe63.11.986
Subject(s) - thermodynamics , viscosity , temperature dependence of liquid viscosity , argon , materials science , relative viscosity , diffusion , shear viscosity , kinetic energy , shear (geology) , volume viscosity , similarity (geometry) , reduced viscosity , molecule , chemistry , physics , organic chemistry , classical mechanics , composite material , image (mathematics) , artificial intelligence , computer science
In this paper, two theses are substantiated. (i) The viscosity of liquids in the larger part of the temperature interval, where this phase state exists, is governed by frictional effects between the molecular layers that move relative to one another. (ii) Argon and water at temperatures TH < T < TC (TH ≈ 315 K and TC is the corresponding critical temperature) have kinetic coefficients belonging to the same class of similarity. This is so because the behavior of the shear viscosity in water is driven by the averaged interaction potential between the molecules. On the basis of the similarity principle applied to the corresponding states of water and argon, the self-diffusion and shear viscosity coefficients of water are calculated. The inadequacy of activation mechanisms responsible for the formation of the viscosity and self-diffusion processes in water and most low-molecular liquids is discussed.