1.8. Role of Viscosity in Statics and Dynamics

Try these first

1. 1.

   Define viscosity in a sentence.

   Hint

   Think about how sticky liquids feel.

2. 2.

   What is dynamic viscosity?

   Hint

   Remember the symbol that represents it.

3. 3.

   What is viscosity?

   • A measure of density
   • A measure of fluid flow resistance
   • A measure of temperature

   Hint

   Think about how easily a liquid pours.

4. 4.

   True or False: Higher viscosity fluids flow faster than lower viscosity fluids.

   • True
   • False

   Hint

   Consider thick versus thin liquids.

5. 5.

   If a liquid with a dynamic viscosity of 0.5 Pa.s is flowing through a pipe with a diameter of 10 cm at a speed of 1 m/s, calculate the Reynolds number for this flow condition. What does this indicate about the flow type?

   Hint

   Use the formula for Reynolds number and check the criteria for laminar versus turbulent flow.

6. 6.

   Discuss how the viscosity of a fluid can be reduced in industrial applications. Provide examples of how this impacts flow in pipelines.

   Hint

   Consider why industries might want to transport fluids quickly.