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Visualization of the viscous flow induced by a round jet

Published online by Cambridge University Press:  20 April 2006

Erwin Zauner
Erwin Zauner
Affiliation:
Technische Universität Wien, Austria
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Abstract

The flow induced by a laminar round glycerol jet emerging from a plane wall is investigated. The flow field (jet region as well as outer flow field) is visualized by means of very small bubbles suspended in the fluid. For slender jets the observed flow pattern disagrees with both potential-flow theory and Squire's ‘exact’ solution, but it is in excellent agreement with results of an asymptotic analysis by Schneider (1981). At a downstream distance that depends exponentially on the square of the Reynolds number, the jet develops into a toroidal eddy as predicted by Schneider (1985). In an apparatus of reasonable size the eddy can be observed only in a very limited Reynolds-number regime.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 154 , May 1985 , pp. 111 - 119
Copyright
© 1985 Cambridge University Press

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