18.3. Nikuradse’s Experimental Findings

Try these first

1. 1.

   What is the Darcy-Weisbach equation used for?

   Hint

   Think about what factors it includes.

2. 2.

   Define Reynolds number.

   Hint

   What does it help determine?

3. 3.

   What does the Darcy-Weisbach equation primarily calculate?

   • Velocity
   • Pressure
   • Head Loss

   Hint

   Think about the main focus of this equation.

4. 4.

   True or False: The friction factor increases with smooth pipe surfaces.

   • True
   • False

   Hint

   Consider the relationship between surface roughness and fluid movement.

5. 5.

   Given a pipe of length 100 meters, diameter 0.2 meters, and an average velocity of 3 m/s, calculate the head loss using the Darcy-Weisbach equation if the friction factor is determined to be 0.02.

   Hint

   Make sure to convert the velocity correctly in your calculations.

6. 6.

   Explain how you would use the Moody chart to determine the friction factor for a pipe with a known roughness height of 0.003 m and a Reynolds number of 5000.

   Hint

   Recall that the chart indicates values based on friction levels for various conditions.