6.5. Velocity Calculation After the Jump

Try these first

1. 1.

   What is the Froude number for a velocity of 5 m/s at a depth of 0.2 m?

   Hint

   Remember to substitute the known values carefully.

2. 2.

   Identify whether a Froude number of 0.5 indicates supercritical or subcritical flow.

   Hint

   Think about the definitions of subcritical and supercritical flow.

3. 3.

   What does a Froude number greater than 1 indicate?

   • Subcritical flow
   • Supercritical flow
   • Transcritical flow

   Hint

   Remember, supercritical flow is associated with faster velocities.

4. 4.

   True or False: Hydraulic jumps occur in subcritical flows.

   • True
   • False

   Hint

   Consider the relationship between flow regimes.

5. 5.

   In a channel with V1 = 7 m/s, y1 = 0.6 m, determine y2, V2, and head loss if Fr1 > 1.

   Hint

   Remember each step must follow fluid principles.

6. 6.

   Given y1 = 0.5 m and energy loss of 2 m between two depths, calculate y2 and validate if the jump configuration is correct.

   Hint

   Consider the practical limits of water flow in gravity-fed systems.