Size dependence of the surface tension of a free surface of an isotropic fluid

We report on the size dependence of the surface tension of a free surface of an isotropic fluid. The size dependence of the surface tension is evaluated based on the Gibbs-Tolman-Koenig-Buff equation for positive and negative values of curvatures and the Tolman lengths. For all combinations of posit...

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Bibliographic Details
Published in:arXiv.org 2020-06
Main Authors: Burian, Sergii, Isaiev, Mykola, Termentzidis, Konstantinos, Sysoev, Vladimir, Bulavin, Leonid
Format: Article
Language:English
Subjects:
Continuity (mathematics)
Curvature
Dependence
Free surfaces
Molecular dynamics
Surface tension
Thermodynamic equilibrium
Water drops
Online Access:Get full text
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Summary:We report on the size dependence of the surface tension of a free surface of an isotropic fluid. The size dependence of the surface tension is evaluated based on the Gibbs-Tolman-Koenig-Buff equation for positive and negative values of curvatures and the Tolman lengths. For all combinations of positive and negative signs of curvature and the Tolman length, we succeed to have a continuous function, avoiding the existing discontinuity at zero curvature (flat interfaces). As an example, a water droplet in the thermodynamical equilibrium with the vapor is analyzed in detail. The size dependence of the surface tension and the Tolman length are evaluated with the use of experimental data of the International Association for the Properties of Water and Steam. The evaluated Tolman length of our approach is in good agreement with molecular dynamics and experimental data
ISSN:2331-8422
DOI:10.48550/arxiv.1701.02497