Civil Engineering MCQAE Level Civil Engineering
The energy loss in a hydraulic jump in a rectangular channel in terms of depths y1 (upstream) and y2 (downstream) is:
Fluid MechanicsHydraulic Jump EnergyMEDIUM
Choose the correct answer
A
E_L = (y2 - y1)^3 / (4 y1 y2)
B
E_L = (y1 + y2) / 2
C
E_L = (y2 - y1)^2 / 2g
D
E_L = V1^2/(2g) - V2^2/(2g)
Correct Answer
A. E_L = (y2 - y1)^3 / (4 y1 y2)
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Energy loss in hydraulic jump: E_L = (y2 - y1)^3 / (4 y1 y2). This is derived from specific energy equation combined with Belanger equation. The loss is entirely due to turbulent dissipation.
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