Bubble Entrainment and Dispersion in Plunging Jet Flows: Freshwater Versus Seawater

Chanson, H., Aoki, S. and Hoque, A. (2006) Bubble Entrainment and Dispersion in Plunging Jet Flows: Freshwater Versus Seawater. Journal of Coastal Research, 22 3: 664-677. doi:10.2112/03-0112.1

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Author Chanson, H.
Aoki, S.
Hoque, A.
Title Bubble Entrainment and Dispersion in Plunging Jet Flows: Freshwater Versus Seawater
Journal name Journal of Coastal Research   Check publisher's open access policy
ISSN 0749-0208
Publication date 2006-05-01
Sub-type Article (original research)
DOI 10.2112/03-0112.1
Open Access Status File (Author Post-print)
Volume 22
Issue 3
Start page 664
End page 677
Total pages 14
Editor Charles W. Finkl
Place of publication United States
Publisher Coastal Education and Research Foundation, Inc.
Language eng
Subject 291205 Ocean Engineering
270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)
240000 Physical Sciences
291200 Maritime Engineering
270799 Ecology and Evolution not elsewhere classified
291803 Turbulent Flows
240500 Classical Physics
291199 Environmental Engineering not elsewhere classified
290800 Civil Engineering
260400 Oceanography
240502 Fluid Physics
290000 Engineering and Technology
291100 Environmental Engineering
260403 Physical Oceanography
291800 Interdisciplinary Engineering
270700 Ecology and Evolution
290802 Water and Sanitary Engineering
770402 Land and water management
Abstract Air entrainment and bubble dispersion were studied systematically at vertical circular plunging jets in freshwater, saltwater and seawater. Although the inception conditions for air entrainment are identical for all water solutions, experimental results show lesser air entrainment in seawater plunging jets for identical inflow conditions. Comparison between seawater and saltwater results suggest that organic matter and bio-chemicals harden the induction trumpet at plunge point and diminish air entrapment at impingement in seawater. Froude-similar experiments with different geometric scales show lesser air entrainment for inflow conditions satisfying We < 1E+3. The results show that classical dimensional analysis of air entrainment is incomplete, while they would imply scales effects in terms of air entrainment for small laboratory studies with wave height at breaking less than 0.3 m.
Keyword air entrainment
physical modelling
scale effects
Q-Index Code C1
Additional Notes Originally published as Chanson, H., Aoki, S., and Hoque, A. (2006). "Bubble Entrainment and Dispersion in Plunging Jet Flows: Freshwater versus Seawater." Jl of Coastal Research, Vol. 22, No. 3, May, pp. 664-677 (ISSN 0749-0208). Copyright 2006 Coastal Education and Research Foundation. All rights reserved.

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Created: Mon, 05 Jun 2006, 10:00:00 EST by Hubert Chanson on behalf of School of Engineering