6.11. Calculating Specific Energy in Rectangular Channel

Try these first

1. 1.

   What is the formula for specific energy?

   Hint

   Think about energy components in fluid flow.

2. 2.

   Define hydraulic jump.

   Hint

   Remember the flow regimes!

3. 3.

   What is the condition for supercritical flow?

   • Fr < 1
   • Fr = 1
   • Fr > 1

   Hint

   Think about flow speed relative to gravity.

4. 4.

   True or False: A hydraulic jump causes an increase in water depth.

   • True
   • False

   Hint

   Recall the characteristics of a hydraulic jump.

5. 5.

   A rectangular channel has a width of 2 meters and can carry a flow of 5 m³/s at a depth of 1 meter. Calculate the specific energy and the alternate depth. What happens to the Froude number?

   Hint

   Ensure to use the correct dimensions and application of the formulas.

6. 6.

   Derive the energy loss formula hl = (y2 - y1) + (V1²/2g - V2²/2g) from Bernoulli’s equation.

   Hint

   Utilize your understanding of energy conservation in fluid flow.