Bubble Entrainment, Spray and Splashing at Hydraulic Jumps

Chanson, Hubert (2006) Bubble Entrainment, Spray and Splashing at Hydraulic Jumps. Journal of Zhejiang University SCIENCE A, 7 8: 1396-1405. doi:10.1631/jzus.2006.A1396

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Author Chanson, Hubert
Title Bubble Entrainment, Spray and Splashing at Hydraulic Jumps
Journal name Journal of Zhejiang University SCIENCE A   Check publisher's open access policy
ISSN 1673-565X
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1631/jzus.2006.A1396
Open Access Status File (Author Post-print)
Volume 7
Issue 8
Start page 1396
End page 1405
Total pages 10
Editor Wei Yang
Place of publication Hangzhou, China
Publisher Zhejiang University Press
Language eng
Subject 260502 Surfacewater Hydrology
240502 Fluid Physics
240000 Physical Sciences
291100 Environmental Engineering
290000 Engineering and Technology
291899 Interdisciplinary Engineering not elsewhere classified
291800 Interdisciplinary Engineering
300100 Soil and Water Sciences
291803 Turbulent Flows
240500 Classical Physics
260500 Hydrology
290802 Water and Sanitary Engineering
300105 Applied Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
291199 Environmental Engineering not elsewhere classified
290800 Civil Engineering
Abstract The sudden transition from a high-velocity, supercritical open channel flow into a slow-moving sub-critical flow is a hydraulic jump. Such a flow is characterised by a sudden rise of the free-surface, with some strong energy dissipation and air entrainment, waves and spray. New two-phase flow measurements were performed in the developing flow region using a large-size facility operating at large Reynolds numbers. The experimental results demonstrated the complexity of the flow with a developing mixing layer in which entrained bubbles are advected in a high shear stress flow. The relationship between bubble count rates and void fractions was non-unique in the shear zone, supporting earlier observations of some form of double diffusion process between momentum and air bubbles. In the upper region, the flow consisted primarily of water drops and packets surrounded by air. Visually significant pray and splashing were significant above the jump roller. The present study is the first comprehensive study detailing the two-phase flow properties of both the bubbly and spray regions of hydraulic jumps, a first step towards understanding the interactions between bubble entrainment and droplet ejection processes.
Keyword hydraulic jump
air bubble entrainment
spray and splashing
physical modelling
particle chord time distributions
References Bakhmeteff, B.A. (1932). "Hydraulics of Open Channels." McGraw-Hill, New York, USA, 1st ed., 329 pages. Belanger, J.B. (1828). "Essai sur la Solution Numerique de quelques Problemes Relatifs au Mouvement Permanent des Eaux Courantes." ('Essay on the Numerical Solution of Some Problems relative to Steady Flow of Water.') Carilian-Goeury, Paris, France (in French). Brattberg, T., Chanson, H., and Toombes, L. (1998). "Experimental Investigations of Free-Surface Aeration in the Developing Flow of Two-Dimensional Water Jets." Jl of Fluids Eng., Trans. ASME, Vol. 120, No. 4, pp. 738-744. Chanson, H. (1989). "Study of Air Entrainment and Aeration Devices." Jl of Hyd. Res., IAHR, Vol. 27, No. 3, pp. 301-319. Chanson, H. (1997). "Air Bubble Entrainment in Free-Surface Turbulent Shear Flows." Academic Press, London, UK, 401 pages. Chanson, H. (1999). "Turbulent Open-Channel Flows : Drop-Generation and Self-Aeration. Discussion." Jl of Hyd. Engrg., ASCE, Vol. 125, No. 6, pp. 668-670 (ISSN 0733-9429). Chanson, H. (2002). "Air-Water Flow Measurements with Intrusive Phase-Detection Probes. Can we Improve their Interpretation ?." Jl of Hyd. Engrg., ASCE, Vol. 128, No. 3, pp. 252-255. Chanson, H. (2004a). "The Hydraulics of Open Channel Flows : An Introduction." Butterworth-Heinemann, Oxford, UK, 2nd edition. {http://www.uq.edu.au/~e2hchans/reprints/book3_2.htm} Chanson, H. (2004b). "Compressibility of Extra-High-Velocity Aerated Flow: a Discussion." Jl of Hyd. Res., IAHR, Vol. 42, No. 2, pp. (ISSN 0022-1686). Chanson, H. (2006). "Air Bubble Entrainment in Hydraulic Jumps. Similitude and Scale Effects." Report No. CH57/05, Dept. of Civil Engineering, The University of Queensland, Brisbane, Australia, Jan., 119 pages. Chanson, H., and Brattberg, T. (1998). "Air Entrainment by Two-Dimensional Plunging Jets : the Impingement Region and the Very-Near Flow Field." Proc. 1998 ASME Fluids Eng. Conf., FEDSM'98, Washington DC, USA, June 21-25, Keynote lecture, Paper FEDSM98-4806, 8 pages (CD-ROM). Chanson, H., and Brattberg, T. (2000). "Experimental Study of the Air-Water Shear Flow in a Hydraulic Jump." Intl Jl of Multiphase Flow, Vol. 26, No. 4, pp. 583-607. Chanson, H., and Gonzalez, C.A. (2004). "Interactions between Free-surface, Free-stream Turbulence and Cavity Recirculation in Open Channel Flows: Measurements and Turbulence Manipulation." Proc. 5th Intl Conf. on Multiphase Flow, Yokohama, Japan, Y. Matsumoto, K. Hishida, A. Tomiyama, K. Mishima and S. Hosokawa editors, Paper 104, 14 pages (CD-ROM). Crowe, C., Sommerfield, M., and Tsuji, Y. (1998). "Multiphase Flows with Droplets and Particles." CRC Press, Boca Raton, USA, 471 pages. Einstein, A. (1906). "Eine Neue Bestimmung der Moleküldimensionen." Ann. Phys., 19, p. 289. Einstein, A. (1911). "Eine Neue Bestimmung der Moleküldimensionen." Ann. Phys., 34, p. 591. Henderson, F.M. (1966). "Open Channel Flow." MacMillan Company, New York, USA. Hong, M., Cartellier, A., and Hopfinger, E.J. (2004). "Characterization of Phase Detection Optical Probes for the Measurement of the Dispersed Phase Parameters in Sprays." Intl Jl Multiphase Flow, Vol. 30, pp. 615-648. Hoyt, J.W., and Taylor, J.J. (1977). "Turbulence Structure in a Water Jet Discharging in Air." Physics of Fluids, Vol. 20, No. 10, Pt. II, Oct., pp. S253-S257. Mossa, M., and Tolve, U. (1998). "Flow Visualization in Bubbly Two-Phase Hydraulic Jump." Jl Fluids Eng., ASME, Vol. 120, March, pp. 160-165. Murzyn, F., Mouaze, D., and Chaplin, J.R. (2005). "Optical Fibre Probe Measurements of Bubbly Flow in Hydraulic Jumps" Intl Jl of Multiphase Flow, Vol. 31, No. 1, pp. 141-154. Rajaratnam, N. (1962). "An Experimental Study of Air Entrainment Characteristics of the Hydraulic Jump." Jl of Instn. Eng. India, Vol. 42, No. 7, March, pp. 247-273. Rao, N.S.L., and Kobus, H.E. (1971). "Characteristics of Self-Aerated Free-Surface Flows." Water and Waste Water/Current Research and Practice, Vol. 10, Eric Schmidt Verlag, Berlin, Germany. Rein, M. (1998). "Turbulent Open-Channel Flows : Drop-Generation and Self-Aeration." Jl of Hyd. Engrg., ASCE, Vol. 124, No.1, pp. 98-102. Discussion : Vol. 125, No. 6, pp. 668-670. Resch, F.J., and Leutheusser, H.J. (1972). "Le Ressaut Hydraulique : Mesure de Turbulence dans la Region Diphasique." ('The Hydraulic Jump : Turbulence Measurements in the Two-Phase Flow Region.') Jl La Houille Blanche, No. 4, pp. 279-293 (in French). Thandaveswara, B.S. (1974). "Self Aerated Flow Characteristics in Developing Zones and in Hydraulic Jumps." Ph.D. thesis, Dept. of Civil Engrg., Indian Institute of Science, Bangalore, India, 399 pages. Toombes, L. (2002). "Experimental Study of Air-Water Flow Properties on Low-Gradient Stepped Cascades." Ph.D. thesis, Dept of Civil Engineering, The University of Queensland. Wisner, P. (1965). "Sur le Role du Critere de Froude dans l'Etude de l'Entrainement de l'Air par les Courants a Grande Vitesse." ('On the Role of the Froude Criterion for the Study of Air Entrainment in High Velocity Flows.') Proc. 11th IAHR Congress, Leningrad, USSR, paper 1.15 (in French).
Q-Index Code C1
Additional Notes CHANSON, H. (2006). "Bubble Entrainment, Spray and Splashing at Hydraulic Jumps." Journal of Zhejiang University SCIENCE A, Vol. 7, No. 8, pp. 1396-1405 (ISSN 1009-3095 (print version); 1862-1775 (electronic version)).

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Sub-type: Article (original research)
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Created: Mon, 31 Jul 2006, 10:00:00 EST by Hubert Chanson on behalf of Library Corporate Services