14.4.3. Frictional Forces in Open Channel Flow

Try these first

1. 1.

   Define open channel flow.

   Hint

   Think about what distinguishes it from pipe flow.

2. 2.

   What is the primary force acting on fluids in open channels?

   Hint

   Consider the forces that drive flow down a slope.

3. 3.

   What is the main driving force of open channel flow?

   • Pressure
   • Friction
   • Gravity

   Hint

   Consider what propels water down a slope.

4. 4.

   True or False: In open channel flow, the fluid velocity is maximum at the free surface.

   • True
   • False

   Hint

   Think about how friction affects velocity distributions in fluids.

5. 5.

   A rectangular channel has a width of 4 m and a flow depth of 3 m. Calculate the hydraulic radius.

   Hint

   Use the formula R = A / P.

6. 6.

   In a section of a river, it has been observed that the flow depth h varies from 2 m to 1 m over a distance of 10 m. Define the flow type.

   Hint

   Consider how quickly parameters are changing.