Slow Wetting of a Solid by a Liquid Film from a Moving Meniscus

✍ Scribed by Oleg V. Voinov

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 186 KB
• Volume: 188
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.4717

✦ Synopsis

angle is very low. The results of ( 2 ) are counterparts to This paper develops the theory of slow motion of a thin wetting the corresponding results in ( 3,4 ) . liquid film attached to a meniscus on a solid surface; the liquid is Less studied are nonstationary movements of the wetting assumed to be completely wetting. The film spreads under Van films. In (5, 6) self-similar solutions to the problem on dyder Waals forces. To describe the film dynamics, a problem for namics of an unbounded film are obtained. Lopez et al. (5) the evolution equation with boundary conditions at the (unknown) derived the diffusion motion law for points at which the film contact line and at the meniscus edge is formulated. The selfthickness is constant. Solutions to the thickness diffusion similar solution is studied. Wetting diffusion kinetics equations equation were considered by de Gennes (6).

are derived. The influence of the curvature radius of an immovable In (7,8) the nonstationary dynamics of a film subjected meniscus on the contact line dynamics is described analytically.

Wetting is shown to terminate at a certain short radius. A phenom-to Van der Waals forces is described by the problem for the enon of weightlessness of films over a meniscus near a vertical flat evolution equation with boundary conditions wall is demonstrated. Gravitation does not affect the film profile

• at the contact line that separates the dry and wetted when the film length exceeds the meniscus radius by an order of portions of the surface and magnitude. Such an effect is significant only when the film length is much longer.