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Surface free energy density, surface tension and surface stress of solid–fluid interfaces
Publikationstyp
Book Part
Date Issued
2023
Sprache
English
Volume
1-3
Start Page
V2
Citation
Encyclopedia of Solid-Liquid Interfaces V2. Pages 1-3 (2023)
Publisher DOI
Scopus ID
Publisher
Elsevier
ISBN
978-0-323-85669-0
This chapter inspects aspects of the capillarity of solid–fluid interfaces, with a focus on phenomena in which the area of the interface is changed, either by adding/removing atoms at the interface, at constant atomic structure, or by changing the interatomic spacing at constant number of atoms. Emphasis is on a phenomenological description and on clarifying definitions for the three relevant capillary terms: firstly, a specific surface excess free energy, secondly, the surface tension, and thirdly, the surface stress. Capillary equations—linking the capillary forces to stresses in the underlying bulk medium—are presented and their consequences for distinguishing between the capillarity in solids as opposed to that in fluids are discussed.
Subjects
Capillarity
Euler equation
Generalized capillary equation
Gibbs adsorption equation
Lagrangian coordinates
Shuttleworth equation
Surface-induced stress
Surface mean curvature
Young–Laplace equation
DDC Class
510: Mathematics