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RESEARCH PAPERS

Motion of a Particle Floating on a Liquid Meniscus Surface

[+] Author and Article Information
Kenji Katoh

Department of Mechanical Engineering, Osaka City University, Osaka 558, Japan

Hideomi Fujita

Department of Mechanical Engineering, Nagoya University, Nagoya 464, Japan

Eiichiro Imazu

Toho Gas Co., Ltd., Atsutaku, Nagoya 456, Japan

J. Fluids Eng 114(3), 411-416 (Sep 01, 1992) (6 pages) doi:10.1115/1.2910046 History: Received August 20, 1990; Online May 23, 2008

Abstract

A small particle floating on a liquid meniscus surface near a vessel wall tends to approach the wall spontaneously. This particle behavior was theoretically investigated. Because of the solid-liquid wettability, an unbalanced force is caused in the tangential direction to the liquid surface and the particle moves toward the wall. Since the particle is excessively drawn into the liquid due to the wettability, an excessive buoyant force acts on the particle in the vertical direction. The force caused by the wettability points in the normal downward direction to the liquid surface and is balanced with that component of the buoyant force. Then the tangential component of the buoyant force is not balanced and the particle moves upward along the meniscus surface. The particle trajectory calculation based on the above theoretical consideration agrees with the experimental one observed by a high-speed video camera system.

Copyright © 1992 by The American Society of Mechanical Engineers
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