6.1. Introduction to Hydraulic Jumps

Try these first

1. 1.

   Define hydraulic jump in your own words.

   Hint

   Think about the flow conditions before and after.

2. 2.

   What does a Froude number greater than 1 indicate?

   Hint

   Recall the definition of supercritical flow.

3. 3.

   What critical condition does a Froude number greater than 1 represent?

   • Subcritical Flow
   • Supercritical Flow
   • Stable Flow

   Hint

   Recall the definitions for flow states.

4. 4.

   True or False: Energy loss in hydraulic jumps is zero.

   • True
   • False

   Hint

   Consider the nature of hydraulic jumps.

5. 5.

   Design a channel where a hydraulic jump reduces flow velocity from 10 m/s to 2 m/s with an initial depth of 0.5 m. Calculate the necessary elements.

   Hint

   Start with Fr1 and determine the downstream conditions.

6. 6.

   During a hydraulic jump, the initial velocity is 12 m/s, and the suppercritical state causes energy loss of 5 m. Determine the sequent depths and changes.

   Hint

   Remember to keep track of velocity after the jump.