21.2. Example Problems

Try these first

1. 1.

   What is the momentum flux correction factor in laminar flow?

   Hint

   Think about the ratio of averaged to actual velocities.

2. 2.

   Define laminar flow.

   Hint

   Consider how different layers interact.

3. 3.

   What is the typical beta value for laminar flow?

   • 1/2
   • 1/3
   • 1

   Hint

   Consider average velocities compared to actual distributions.

4. 4.

   True or False: Turbulent flow has a beta value close to 1.

   • True
   • False

   Hint

   Think about how velocity flows in turbulent vs laminar scenarios.

5. 5.

   A sluice gate at a depth of 10m experiences a flow velocity of 4m/s. Calculate the horizontal force on the gate if the density of water is 1000 kg/m³.

   Hint

   Focus on hydrostatic pressure for calculations.

6. 6.

   A horizontal water jet with a diameter of 10mm flows into a plate, creating a force. Given velocity at 5m/s, find the force with ρ = 1000 kg/m³.

   Hint

   Use continuity principles to relate jet area to velocity.