Dynamics of Adhesion in Solid/Liquid Systems

E. Wolfram, J. Pintér, E. Ötvös-Papp, E. Kiss

Research output: Article

Abstract

The rate and mechanism of microscopic processes in several types of adhesion phenomena has been studied by high-speed (up to 8000 frames/sec) cinematography. Spreading of a liquid drop on high-energy solid surfaces is preceded by the very rapid advancing of a thick liquid layer which forms immediately when the drop/surface contact takes place. the rate of the motion of the layer and that of the very spreading of the bulk of the drop obey different kinetic laws. Capillary surfaces of gravity-free liquid bridges (i.e., if the bridge liquid connects similar solid surfaces and is immersed in a second liquid with the same density) have the profile of a catenoid. the surface of the thin liquid filament which forms after breakdown of the bridge was, for the first time, observed to assume a sinusoidal shape prior to becoming a satellite droplet having the shape of an oscillating ellipsoid of rotation. This observation directly supports our previously made assumption as to the role played by capillary waves in the instability of liquid bridges. Oil/water displacement in periodically shaped capillary tubes (used for the first time experimentally) shows peculiarities which are not found for uniform (cylindrical) tubes.

Original languageEnglish
Pages (from-to)85-96
Number of pages12
JournalTribology Series
Volume7
Issue numberC
DOIs
Publication statusPublished - 1981

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ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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