Energy Dissipative Plunging Flows
Publication: Journal of Hydraulic Engineering
Volume 136, Issue 8
Abstract
The analysis of plunging flows using energy dissipation hypothesis is presented in this paper. The classic two-control-volume theory has recently been found questionable and needs to be corrected. In this study, we avoid the questionable part of that framework and use a single control volume for the analysis of plunging flows. Furthermore, we hypothesize that the increase in kinetic energy in the underflow and entrained flow should be no greater than the loss in potential energy as the inflow plunges. In the current framework, the entrained flow rate does not exceed approximately 40% of the total inflow rate. The densimetric Froude number at the plunge point, , where rate per unit width; gravity of inflow; and depth at the plunge point, is typically in the range of for plunging flows in a constant width channel.
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Published In
Journal of Hydraulic Engineering
Volume 136 • Issue 8 • August 2010
Pages: 519 - 523
Copyright
© 2010 ASCE.
History
Received: Apr 15, 2008
Accepted: Oct 14, 2009
Published online: Nov 9, 2009
Published in print: Aug 2010
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