GATE 2016 CE (CE1) – Question 26
The pre-jump Froude number in a horizontal rectangular channel is 10. The ratio of post-jump sequent depth to pre-jump depth is ______.
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Correct answer: 13.6 to 13.7
Explanation
For a rectangular-channel hydraulic jump, y2/y1=(sqrt(1+8Fr1²)−1)/2. Substituting Fr1=10 gives(sqrt801−1)/2=13.65097. Thus the requested ratio is **13.65**. It is dimensionless and relates sequent depths across the dissipative jump.