Bubbly Flow Structure in Hydraulic Jump

Chanson, Hubert (2007) Bubbly Flow Structure in Hydraulic Jump. European Journal of Mechanics B, Fluids, 26 3: 367-384. doi:10.1016/j.euromechflu.2006.08.001

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Author Chanson, Hubert
Title Bubbly Flow Structure in Hydraulic Jump
Journal name European Journal of Mechanics B, Fluids   Check publisher's open access policy
ISSN 0997-7546
Publication date 2007-05
Year available 2007
Sub-type Article (original research)
DOI 10.1016/j.euromechflu.2006.08.001
Open Access Status File (Author Post-print)
Volume 26
Issue 3
Start page 367
End page 384
Total pages 18
Place of publication Paris
Publisher Gauthier-villars/editions Elsevier
Collection year 2008
Language eng
Subject 240000 Physical Sciences
240500 Classical Physics
240502 Fluid Physics
260000 Earth Sciences
260500 Hydrology
260502 Surfacewater Hydrology
290000 Engineering and Technology
290600 Chemical Engineering
290601 Chemical Engineering Design
290800 Civil Engineering
290802 Water and Sanitary Engineering
291100 Environmental Engineering
291101 Environmental Engineering Modelling
291800 Interdisciplinary Engineering
291803 Turbulent Flows
300000 Agricultural, Veterinary and Environmental Sciences
300100 Soil and Water Sciences
300105 Applied Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
770400 Coastal and Estuarine Environment
Abstract In an open channel, a hydraulic jump is the rapid transition from super- to sub-critical flow associated with strong turbulence and air bubble entrainment in the mixing layer. New experiments were performed at relatively large Reynolds numbers using phase-detection probes. Some new signal analysis provided characteristic air-water time and length scales of the vortical structures advecting the air bubbles in the developing shear flow. An analysis of the longitudinal air-water flow structure suggested little bubble clustering in the mixing layer, although an interparticle arrival time analysis showed some preferential bubble clustering for small bubbles with chord times below 3 ms. Correlation analyses yielded longitudinal air-water time scales Txx*V1/d1 of about 0.8 in average. The transverse integral length scale Z/d1 of the eddies advecting entrained bubbles was typically between 0.25 and 0.4, irrespective of the inflow conditions within the range of the investigations. Overall the findings highlighted the complicated nature of the air-water flow
Keyword Hydraulic Jumps
Bubbly Flow Structures
Integral Time Scales
Transverse Length Scales
Bubble Chord Time Distributions
Interparticle Arrival Time
Air Bubble Entrainment
Physics, Fluids & Plasmas
Air Entrainment
Plunging Jets
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Q-Index Code C1
Additional Notes This is an author version of an article originally published as CHANSON, H. (2007). "Bubbly Flow Structure in Hydraulic Jump." European Journal of Mechanics B/Fluids, Vol. 26, iss. 3 pp.367-384 doi: 10.1016/j.euromechflu.2006.08.001 (ISSN 0997-7546). Copyright 2007 Elsevier. All rights reserved. Single copies only may be downloaded and printed for a user's personal research and study.

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Created: Thu, 01 Mar 2007, 23:39:35 EST by Hubert Chanson on behalf of School of Engineering