1.5. Problem-solving for laminar and turbulent flow

Try these first

1. 1.

   What is the Reynolds number range for laminar flow?

   Hint

   Think about the boundary for laminar flow.

2. 2.

   Define turbulent flow.

   Hint

   What happens to the fluid in turbulent flow?

3. 3.

   What is the Reynolds number range for laminar flow?

   • Below 2100
   • 2100-4000
   • Above 4000

   Hint

   Where does laminar flow lie compared to turbulent flow?

4. 4.

   True or False: Turbulent flow has a clear and defined dye streak.

   • True
   • False

   Hint

   Recall how dye behaves in both flow types.

5. 5.

   A circular pipe has a diameter of 0.025 m, with water at a temperature of 20°C. Calculate the maximum flow velocity for laminar flow.

   Hint

   Substitute known values carefully into the Reynolds number formula.

6. 6.

   During a systematic check, you find that increasing the temperature of fluid lowers its viscosity. Explain how this impacts flow type and Reynolds number.

   Hint

   Think about how temperature changes affect fluid behavior.