specific energy & hydraulic jump - redac , usmredac.eng.usm.my/eah/handouts/specific energy...
TRANSCRIPT
Prof. Dr. Aminuddin Ab Ghani
Specific Energy &
Hydraulic Jump
Reference
Chapter 13OPEN-CHANNEL FLOW
Lecture slides byMehmet Kanoglu
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Fluid Mechanics: Fundamentals and Applications2nd EDITION IN SI UNITS
Yunus A. Cengel, John M. CimbalaMcGraw-Hill, 2010
SPECIFIC ENERGY
The specific energy Es of a liquid in an open channel is the total mechanical energy (expressed as a head) relative to the bottom of the channel.
SPECIFIC ENERGY
The specific energy reaches a minimum value Es, min at someintermediate point, called the critical point, characterized by the criticaldepth yc and critical velocity Vc. The minimum specific energy is also called the critical energy.
Hydraulic jump
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Schematic and flow depth-specific energy diagram for a hydraulic jump (specific energy decreases).
The energy dissipation ratio represents the fraction of mechanical energy dissipated during a hydraulic jump.
The fraction of energy dissipation ranges from just a few percent for weakhydraulic jumps (Fr1 < 2) to 85 percent for strong jumps (Fr1 > 9).
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