19.8.1. Flow Contractions and Expansions

Try these first

1. 1.

   What occurs to fluid velocity when it flows from a wider pipe to a narrower pipe?

   Hint

   Consider the impact of cross-sectional area on flow.

2. 2.

   Define vortex formation in fluid flow.

   Hint

   Think about how fluid behaves in a circular path.

3. 3.

   What happens to fluid speed in a contraction?

   • Increases
   • Decreases
   • Stays the same

   Hint

   Think about fluid movement in relation to cross-sectional area.

4. 4.

   True or False: Energy loss is greater in expansions than in contractions.

   • True
   • False

   Hint

   Visualize the flow patterns during expansion and contraction.

5. 5.

   Design a water distribution system for a given community. Include considerations for flow contractions and expansions. Explain your design choices.

   Hint

   Think about how pressure and flow characteristics change in different parts of the system.

6. 6.

   Evaluate an existing piping system where high energy loss is reported. Suggest at least two modifications to improve efficiency.

   Hint

   Consider where vortices are likely to form and how to smooth out those transitions.