Air Entrainment in the Developing Flow Region of Plunging Jets - Part 2: Experimental

Cummings, Peter D. and Chanson, Hubert (1997) Air Entrainment in the Developing Flow Region of Plunging Jets - Part 2: Experimental. Journal of Fluids Engineering, 119 3: 603-608.

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Author Cummings, Peter D.
Chanson, Hubert
Title Air Entrainment in the Developing Flow Region of Plunging Jets - Part 2: Experimental
Journal name Journal of Fluids Engineering   Check publisher's open access policy
ISSN 0098-2202
1528-901X
Publication date 1997-01-01
Sub-type Article (original research)
DOI 10.1115/1.2819287
Volume 119
Issue 3
Start page 603
End page 608
Total pages 6
Place of publication New York
Publisher American Society of Mechanical Engineers
Language eng
Subject 290699 Chemical Engineering not elsewhere classified
290105 Other Industrial Biotechnology
240502 Fluid Physics
291100 Environmental Engineering
290000 Engineering and Technology
290600 Chemical Engineering
290500 Mechanical and Industrial Engineering
290399 Manufacturing Engineering not elsewhere classified
290601 Chemical Engineering Design
290200 Aerospace Engineering
290100 Industrial Biotechnology and Food Sciences
290802 Water and Sanitary Engineering
290899 Civil Engineering not elsewhere classified
290800 Civil Engineering
290300 Manufacturing Engineering
290299 Aerospace Engineering not elsewhere classified
Abstract When a water jet impinges a pool of water at rest, air bubbles may be entrained and carried away below the pool free-surface; this process is called plunging jet entrainment. The study presents new experimental data obtained in a vertical supported jet. Distributions of air concentration and mean air-water velocity, and bubble chord length distributions measured in the developing shear layer are presented. The results indicate that the distributions of void fraction follow closely analytical solution of the diffusion equation. Further, the momentum shear layer and the air bubble diffusion layer do not coincide. Chord length data show a wide range of air bubble sizes and overall the experimental results suggest strong interactions between the entrained air bubbles and the momentum transfer mechanisms.
Keyword plunging jet
experiments
air bubble entrainment
two-dimensional flow
entrained bubble size distributions
void fraction
air-water velocity
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes Originally published as Cummings, Peter D. and Chanson, Hubert (1997) Air Entrainment in the Developing Flow Region of Plunging Jets - Part 2: Experimental Development, Journal of Fluids Engineering, 119 (3): 603-608. Copyright 1997 by ASME. Publications can be obtained from the ASME Digital Store (http://store.asme.org/Default.asp?cookie%5Ftest=1). Anyone wishing to use any part of this article must contact ASME for permission at permissions@asme.org. Databank contribution {http://www.uq.edu.au/~e2hchans/data/jfe97.html}. Full experimental data sets may be obtained from the Databank or from the senior writer {h.chanson@uq.edu.au}.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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Created: Tue, 13 Sep 2005, 10:00:00 EST by Hubert Chanson on behalf of School of Engineering