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Visualization of air flow separation past dry and wet tubes

Published online by Cambridge University Press:  15 April 2002

Ph. Speck ,
Y. M. Gbamele ,
Ph. Desevaux ,
P. K. Panday  and
J. P. Prenel
Ph. Speck
Affiliation:
CREST / UMR 6000, Université de Franche-Comté - CNRS, IGE, Parc Technologique, 90000 Belfort, France
Y. M. Gbamele
Affiliation:
CREST / UMR 6000, Université de Franche-Comté - CNRS, IGE, Parc Technologique, 90000 Belfort, France
Ph. Desevaux*
Affiliation:
CREST / UMR 6000, Université de Franche-Comté - CNRS, IGE, Parc Technologique, 90000 Belfort, France
P. K. Panday
Affiliation:
CREST / UMR 6000, Université de Franche-Comté - CNRS, IGE, Parc Technologique, 90000 Belfort, France
J. P. Prenel
Affiliation:
CREST / UMR 6000, Université de Franche-Comté - CNRS, IGE, Parc Technologique, 90000 Belfort, France
*
desevaux@ige.univ-fcomte.fr
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Abstract

This paper describes an optical investigation technique for visualizing the cross section of a vertical air stream flowing downward on a wet horizontal tube with moving liquid film. This method which associates the laser induced fluorescence and laser tomography techniques, uses Mie scattering tracers and fluorescent dye for marking the air and liquid flows, respectively. It allows us to visualize the air and liquid flows independently or simultaneously, and to measure the air flow separation angle. Results are compared with values obtained for a dry tube by the present and of other authors.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 18 , Issue 1 , April 2002 , pp. 57 - 61
Copyright
© EDP Sciences, 2002

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