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The spreading of oil on water in the surface-tension regime

Published online by Cambridge University Press:  21 April 2006

David W. Camp  and
John C. Berg
David W. Camp
Affiliation:
Department of Chemical Engineering, University of Washington, Seattle, WA 98195, USA
John C. Berg
Affiliation:
Department of Chemical Engineering, University of Washington, Seattle, WA 98195, USA
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Abstract

Data which describe the unidirectional spreading of several pure oils and oilsurfactant mixtures on water in the surface-tension regime are reported. Leadingedge position and profiles of velocity, thickness and film tension are given as functions of time. The data are consistent with the numerical similarity solution of Foda & Cox (1980), although the measured dependence of the film tension on the film thickness often differs from the equilibrium relationship. The configuration of the oil film near the spreading origin may be either a coherent multimolecular layer or a multitude of thinning, outward-moving lenses surrounded by monolayer. The pure oils show an acceleration zone connecting the slow-moving inner region to a fast-moving outer region, while the oil-surfactant mixtures show a much more gradual increase in film velocity.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 184 , November 1987 , pp. 445 - 462
Copyright
© 1987 Cambridge University Press

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