20.2.2. Today's Topics

Try these first

1. 1.

   Define conservation of momentum.

   Hint

   Think about what happens to the momentum of a ball thrown in a vacuum.

2. 2.

   What is a control volume?

   Hint

   It’s often used in calculations to understand fluid flow.

3. 3.

   What is the conservation of momentum?

   • Momentum changes with time
   • Momentum remains constant in a closed system
   • Momentum always increases

   Hint

   Consider how momentum behaves in a closed system.

4. 4.

   True or False: Momentum flux correction factors are used only for uniform flow conditions.

   • True
   • False

   Hint

   Think about when flow conditions are complex or vary significantly.

5. 5.

   For a pipe with a flow section experiencing varying velocities, derive the momentum flux using correction factors and illustrate how this impacts the overall system.

   Hint

   Utilize real experimental data to better understand how these corrections affect the calculations.

6. 6.

   Consider a scenario of turbulent flow around bridge piers. Formulate the momentum equations reflecting the forces acting on the piers and resulting fluid behavior.

   Hint

   Visual aids can help represent varying pressure landscapes effectively.