Levitation of a drop over a film flow

Sreenivas, KR and De, PK and Arakeri, JH (1999) Levitation of a drop over a film flow. In: Journal of Fluid Mechanics, 380 . pp. 297-307.

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Abstract

A vertical jet of water impinging on a horizontal surface produces a radial film flow followed by a circular hydraulic jump. We report a phenomenon where fairly large (1 mi) drops of liquid levitate just upstream of the jump on a thin air layer between the drop and the film flow. We explain the phenomenon using lubrication theory. Bearing action both in the air film and the water film seems to be necessary to support large drops. Horizontal support is given to the drop by the hydraulic jump. A variety of drop shapes is observed depending on the volume of the drop and liquid properties. We show that interaction of the forces due to gravity, surface tension, viscosity and inertia produces these various shapes.

Item Type:	Journal Article
Publication:	Journal of Fluid Mechanics
Publisher:	Cambridge University Press
Additional Information:	Copyright of this article belongs to Cambridge University Press.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	23 Jun 2011 09:39
Last Modified:	23 Jun 2011 09:39
URI:	http://eprints.iisc.ac.in/id/eprint/38608

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