Bubbly Two-Phase Flow in Hydraulic Jumps at Large Froude Numbers
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 4
Abstract
A hydraulic jump is a sudden, rapid transition from a supercritical flow to a subcritical flow. At large inflow Froude numbers, the jump is characterized by a significant amount of entrained air. For this paper, the bubbly two-phase flow properties of steady and strong hydraulic jumps were investigated experimentally. The results demonstrate that the strong air entrainment rate and the depth-averaged void-fraction data highlight a rapid deaeration of the jump roller. The results suggest that the hydraulic jumps are effective aerators and that the rate of detrainment is comparatively smaller at the largest Froude numbers.
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Acknowledgments
The writer thanks Ben Hopkins and Hugh Cassidy from the University of Queensland who carefully conducted the experimental measurements. He further acknowledges the financial support of the Australian Research Council with Grant No. ARCDP0878922.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 4 • April 2011
Pages: 451 - 460
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jan 15, 2010
Accepted: Aug 18, 2010
Published online: Sep 6, 2010
Published in print: Apr 1, 2011
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