Air Entrainment in the Developing Flow Region of Plunging Jets—Part 1: Theoretical Development-Reference-Cited by-同舟云学术

Air Entrainment in the Developing Flow Region of Plunging Jets—Part 1: Theoretical Development

Published:1997-09-01 Issue:3 Volume:119 Page:597-602
ISSN:0098-2202
Container-title:Journal of Fluids Engineering
language:en
Short-container-title:

Author:

Cummings P. D.¹,Chanson H.²

Affiliation:

1. Kinhill Engineers, 299 Coronation Drive, Brisbane QLD 4064, Australia

2. Fluid Mechanics, Hydraulics and Environmental Engineering, Department of Civil Engineering, The University of Queensland, Brisbane QLD 4072, Australia

Abstract

Air-water bubbly flows are encountered in many engineering applications. One type of air-water shear flows is the developing flow region of a plunging jet. The mechanisms of air entrainment by plunging liquid jets are discussed in the light of new experimental evidence. Then the air bubble diffusion is analyzed analytically in the near-flow field of both circular and two-dimensional plunging jets. The theoretical developments are compared with existing circular plunging jet data and new experiments performed with a two-dimensional vertical supported jet. The study highlights two mechanisms of air entrainment at the plunge point depending upon the jet impact velocity and results suggest that the dispersion of air bubbles within the shear layer is primarily an advective diffusion process.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/fluidsengineering/article-pdf/119/3/597/5482428/597_1.pdf

Reference23 articles.

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2. Bonetto F. , and LaheyR. T., 1993, “An Experimental Study on Air Carryunder due to a Plunging Liquid Jet,” International Journal of Multiphase Flow, Vol. 19, No. 2, pp. 281–294.

3. Discussion: International Journal of Multiphase Flow, Vol. 20, No. 3, pp. 667–770.

4. Bonetto F. , DrewD., and LaheyR. T., 1994, “The Analysis of a Plunging Liquid Jet—The Air Entrainment Process,” Chemical Engineering Communication, Vol. 130, pp. 11–29.

5. Burley R. , and JollyR. P. S., 1984, “Entrainment of Air into Liquids by a High Speed Continuous Solid Surface,” Chemical Engineering Science, Vol. 39, No. 9, pp. 1357–1372.

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