A kinetic approach to the calculation of surface tension of a spherical
drop |
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Authors: | V Molinari D Mostacci M Premuda |
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Institution: | (1) INFM-BO and Laboratorio di Ingegneria Nucleare di Montecuccolino, Università degli Studi di Bologna via dei Colli 16, 40136 Bologna, Italy |
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Abstract: | In literature, surface tension has been investigated mainly from a
Thermodynamics standpoint, more rarely with kinetic methods. In the
present work, surface tension of drops is studied in the framework
of kinetic theory, starting from the Sutherland approximation to Van
Der Waals interaction between molecules. Surface tension is calculated
as a function of drop radius: it is found that it approaches swiftly
an asymptotic value, for radii of several times the distance of minimum
approach D of the Sutherland potential. This theoretical asymptotic
value is compared to experimental values of surface tension in plane
surfaces of a few liquids, and is found in reasonable agreement. |
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Keywords: | 68 03 Cd Surface tension and related phenomena 05 70 Np Interface and surface thermodynamics |
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