18.3.1. Friction Factors in Laminar Flow

Try these first

1. 1.

   What does head loss indicate in a fluid flow system?

   Hint

   Think about energy in terms of height.

2. 2.

   What equation do we use to express the friction factor in laminar flow?

   Hint

   Recall the relationship for laminar flow behavior.

3. 3.

   Which equation represents the friction factor for laminar flows?

   • f = Re
   • f = 64/Re
   • f = 1/Re

   Hint

   Focus on the relationship identified in the discussion.

4. 4.

   True or False: Surface roughness decreases energy loss in fluid flow.

   • True
   • False

   Hint

   Remember how turbulence affects flow efficiency.

5. 5.

   Given a pipe with a diameter of 0.2 meters carrying water with a Reynolds number of 3000, determine the friction factor and the expected head loss for 100 meters of pipe. Use the Darcy-Weisbach equation.

   Hint

   Use the provided relationships for calculations.

6. 6.

   Compare the energy loss in a water pipeline made from PVC versus one made from cast iron, given that PVC is smoother than cast iron. Discuss how this affects the design considerations.

   Hint

   Assess how surface characteristics influence overall efficiency.