16.4.1. Formation of Hydraulic Jumps

Try these first

1. 1.

   Define a hydraulic jump.

   Hint

   Think about flow conditions and energy transitions.

2. 2.

   What does a Froude number greater than one indicate?

   Hint

   Recall the definition and significance of the Froude number.

3. 3.

   What occurs during a hydraulic jump?

   • Flow remains unchanged
   • Flow transitions from supercritical to subcritical
   • Flow stops

   Hint

   Think about the flow types described.

4. 4.

   True or False: The Froude number is used to distinguish between two types of fluid flow.

   • True
   • False

   Hint

   Recall the function of the Froude number.

5. 5.

   A pipe discharges water into a rectangular channel with an upstream velocity of 15 m/s and a flow depth of 0.5 m. Calculate the downstream velocity and flow depth when a hydraulic jump occurs.

   Hint

   Use hydraulic jump equations to determine variables.

6. 6.

   Design a spillway considering the energy loss during a hydraulic jump, specifying the dimensions and flow expected during peak rain events.

   Hint

   Consider specific energy relationships in designs.