1.1. Viscous flow in pipes

Try these first

1. 1.

   What is viscous flow?

   Hint

   Think about how thick liquids behave.

2. 2.

   What is the main driving force for flow in pipes?

   Hint

   Consider how water flows through a pipe.

3. 3.

   What type of flow is characterized by a Reynolds number below 2100?

   • Turbulent
   • Laminar
   • Transitional

   Hint

   Think about the flow characteristics at low speeds.

4. 4.

   True or False: The pressure gradient is the primary driving force for flow in open channels.

   • True
   • False

   Hint

   Recall how fluids behave in open channels.

5. 5.

   A fluid flows through a long, smooth pipe at a velocity of 1 m/s. If the diameter of the pipe is doubled, how does the Reynolds number change assuming viscosity stays the same?

   Hint

   Remember the Reynolds number formula: Re = (density × velocity × diameter) / viscosity.

6. 6.

   Design an experiment to demonstrate the transition from laminar to turbulent flow using water and a dye. Describe the setup and the expected observations.

   Hint

   Focus on the visualization aspects with dye to observe the patterns.