Abstract
SOME time ago1, I put forward certain very simple suggestions concerning the mechanism of the viscosity of liquids. These notions led to, among other things, a formula for the viscosity of simple (monatomic) liquids at the melting point which has been surprisingly successful in representing the melting point viscosity, ηM, of liquid metals2. My assumption is that in a simple (monatomic) liquid at melting point the atoms are vibrating about a mean position which very slowly migrates, and that momentum is transferred from layer to layer of the liquid at the extreme-librations. This gives for the viscosity at melting point: where ν is the frequency, m the mass of the atom and σ the interatomic distance, while A is a constant the precise calculation of which would be very difficult, but which must be about 1. I took it as 4/3 in my original paper.
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ANDRADE, E. Viscosity and Thermal Conductivity of Liquid Argon. Nature 170, 794 (1952). https://doi.org/10.1038/170794b0
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DOI: https://doi.org/10.1038/170794b0
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