2.1. Introduction to Open Channel Flow and Uniform Flow (Contd.)

Try these first

1. 1.

   Define specific energy in your own words.

   Hint

   Think about how depth and velocity relate.

2. 2.

   What is the continuity equation used for?

   Hint

   Consider the relationship between area and velocity.

3. 3.

   What is specific energy in open channel flow?

   • Only potential energy
   • Only kinetic energy
   • Total energy per unit weight

   Hint

   Remember the components that make it up.

4. 4.

   True or False: The continuity equation states that mass is conserved in fluid flow.

   • True
   • False

   Hint

   Think about mass flow rates before and after any section.

5. 5.

   A rectangular channel has a water depth of 3 ft and a flow velocity of 4 ft/s. Calculate the specific energy and determine what happens if the depth increases to 4 ft.

   Hint

   Use the depth values in the specific energy equation.

6. 6.

   Given a channel that widens from 5 ft to 10 ft, and initial velocity is 6 ft/s, calculate the new velocity using continuity. Discuss the effect on specific energy.

   Hint

   Recall that A1V1 = A2V2 applies directly here.