4.2. Head Loss Due to Contraction

Try these first

1. 1.

   What does head loss in fluid dynamics refer to?

   Hint

   Think about the energy we use to pump fluid.

2. 2.

   What is the contraction loss coefficient (k_c)?

   Hint

   This value is often assumed to be 0.5 for sudden contractions.

3. 3.

   What is the value of the contraction loss coefficient (k_c) for abrupt contractions?

   • 0.1
   • 0.5
   • 0.8

   Hint

   Think about how much turbulence is created in sudden changes.

4. 4.

   True or False: Gradual contractions lead to less head loss than sudden contractions.

   • True
   • False

   Hint

   Consider the effects of fluid flow.

5. 5.

   Determine the head loss in a piping system where the inlet diameter is 0.1 meters and the outlet diameter is 0.05 meters. If the flow velocity is 3 m/s, compute the loss using k_c = 0.5.

   Hint

   Refer back to the equations used for calculations.

6. 6.

   In a system with varying diameters, analyze and compute head losses for both sudden and gradual transitions, comparing energy lost.

   Hint

   Make sure to detail each step in your analysis and refer to the section for coefficients.