19.3.1. Turbulent Flow and Reynolds Number

Try these first

1. 1.

   What is the Reynolds number used for?

   Hint

   Think about fluid behavior.

2. 2.

   At what Reynolds number does turbulent flow generally occur?

   Hint

   Remember the threshold from our discussion.

3. 3.

   What defines a turbulent flow?

   • Smooth and orderly movement
   • Chaotic and irregular movement
   • Constant velocity movement

   Hint

   Consider definitions we discussed in class.

4. 4.

   Is a Reynolds number below 2300 indicative of turbulent flow?

   • True
   • False

   Hint

   Recall the thresholds we covered.

5. 5.

   A fluid with density 1200 kg/m³ and viscosity 0.002 Pa·s flows through a pipe of 0.1 m diameter at a speed of 3 m/s. Determine if the flow is laminar, transitional, or turbulent.

   Hint

   Make sure you use the correct formula and factor in all parameters.

6. 6.

   What would happen to the Reynolds number if the pipe diameter were halved while keeping all other factors constant? Discuss the impact on flow type.

   Hint

   Think through how changing each parameter affects the classification.