CIFICEN 24414
CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Buoyancy and capillary effects on floating liquid lenses
Autor/es:
RAVAZZOLI, PABLO D.; HOWARD A. STONE; JAVIER A. DIEZ; ALEJANDRO G. GONZÁLEZ; RAVAZZOLI, PABLO D.; HOWARD A. STONE; JAVIER A. DIEZ; ALEJANDRO G. GONZÁLEZ
Revista:
Physical Review Fluids
Editorial:
American Physical Society
Referencias:
Año: 2020 vol. 5 p. 7360401 - 7360418
ISSN:
2469-990X
Resumen:
We study the equilibrium shape of a liquid drop resting on top of a liquid surface, i.e.,a floating lens. We consider the surface tension forces in nonwetting situations (negativespreading factor), as well as the effects of gravity. We obtain analytical expressions for thedrop shape when gravity can be neglected. Perhaps surprisingly, when including gravityin the analysis, we find two different families of equilibrium solutions for the same set ofphysical parameters. These solutions correspond to drops whose center of mass is aboveor below the level of the external liquid surface. By means of energetic considerations, wedetermine the family that has the smallest energy, and therefore is the most probable tobe found in nature. A detailed explanation of the geometrical differences between the twotypes of solutions is provided.
