2. Calculation Problem: Laminar flow in pipes

Try these first

1. 1.

   What is the formula for calculating Reynolds number?

   Hint

   Remember how each variable relates to the flow conditions.

2. 2.

   Define specific gravity in terms of fluid density.

   Hint

   Think about how we compare fluids with water.

3. 3.

   What is the criteria for laminar flow based on the Reynolds number?

   • Re < 1000
   • Re < 2000
   • Re > 2000

   Hint

   Recall specific values that define flow regimes.

4. 4.

   True or False: Viscosity is a measure of fluid's resistance to flow.

   • True
   • False

   Hint

   Think about fluids with high and low viscosity.

5. 5.

   You have a liquid with a viscosity of 1.5 poise and a specific gravity of 0.9 flowing through a pipe of diameter 100mm over 20m. Calculate the pressure difference when 100 kg is collected in 25 seconds.

   Hint

   Focus on converting poise to Pascal seconds first.

6. 6.

   Analyze how an increase in pipe diameter would affect the pressure drop experienced in laminar flow and reason your answer based on the equations.

   Hint

   Think about the relationship established in Poiseuille's Law when diameter changes.