Analysis of the Kinematic Viscosity and Self-Diffusion of Liquid Metals at the Melting Temperature

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Abstract
The influences of the atomic size and mass on the kinematic viscosity and self-diffusion coefficient of metal liquids have been studied. The analysis was performed with experimental data on the kinetic properties of metals at the melting temperature. Regression analysis shows that the kinematic viscosity and self-diffusion coefficient increase with an increase in the size of atoms and a decrease in their mass. Note that the atomic mass is more closely related to the kinetic properties of a metal liquid in comparison with the atomic size. It is proposed to use the size–mass factor (which is equal to the ratio of the size of an atom to a square root of its mass) to analyze the kinetic properties of a liquid. The relationship between the kinetic properties and the size–mass factor is characterized by a adjusted determination coefficient, the value of which is above 0.90. It is shown that the kinematic viscosity of a liquid and the self-diffusion coefficient decrease with an increase in the cluster size. It was determined from the dimensionless kinetic parameters that the dimensionless excess entropy at the melting temperature is close to the calculated values for the solidification point of a simple liquid.

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