Accepted articles

Reviews of topical problems


Theoretical and computational approaches for prediction of liquids viscosity

 a, b, c,  a, b, c
a Moscow Institute of Physics and Technology (National Research University), Institutskii per. 9, Dolgoprudny, Moscow Region, 141701, Russian Federation
b Joint Institute for High Temperatures, Russian Academy of Sciences, ul. Izhorskaya 13/19, Moscow, 127412, Russian Federation
c National Research University Higher School of Economics, ul. Myasnitskaya 20, Moscow, 101000, Russian Federation

Predictive models for the shear viscosity of liquids and gases together with the exact equations of state have a great importance for the problems of hydrodynamic modeling of processes occurring in nature, industrial plants and mechanisms. This review aims to consider the currently proposed theoretical, including atomistic modeling, and empirical approaches for predicting the viscosity of liquids, gases and their mixtures in a wide range of thermodynamic conditions. We analyse the viscosity models of homogeneous liquids that are thermodynamically stable. The dynamics of supercooled and glassy liquids, dispersed systems (colloids, emulsions) remains beyond the scope of this review. We discuss the range of applicability of correlation methods for predicting viscosity and the accuracy of various methods at the pressures up to 1 GPa. The application examples of various approaches for hydrocarbons - model oil and gas, fuel and lubrication systems are given. The reported study was funded by RFBR, project number 20-18-50214.

Keywords: shear viscosity, liquids, theoretical models, empirical models, molecular modeling, atomistic modeling
PACS: 66.20.Cy
DOI: 10.3367/UFNe.2021.11.039102
Citation: Kondratyuk N D, Pisarev V V "Theoretical and computational approaches for prediction of liquids viscosity" Phys. Usp., accepted

Received: 26th, August 2021, revised: 17th, November 2021, 18th, November 2021

Оригинал: Кондратюк Н Д, Писарев В В «Теоретические и вычислительные подходы к предсказанию вязкости жидкостей» УФН, принята к публикации; DOI: 10.3367/UFNr.2021.11.039102

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