4.4.1. Sutherland Correlation

Try these first

1. 1.

   What is viscosity?

   Hint

   Think about how thick a material feels when you try to pour it.

2. 2.

   Define shear stress.

   Hint

   Consider forces that cause layers in a fluid to slide over one another.

3. 3.

   What happens to the viscosity of a liquid as temperature increases?

   • It increases
   • It decreases
   • It stays the same

   Hint

   Think about how hot syrup is easier to pour.

4. 4.

   True or False: Newtonian fluids have a variable viscosity based on the shear rate.

   • True
   • False

   Hint

   Remember fixed behavior in common fluids.

5. 5.

   Calculate the viscosity of a gas if a = 1.3, b = 0.5, and T = 300K using the Sutherland equation.

   Hint

   Follow the Sutherland equation closely and perform each step of the calculation.

6. 6.

   Compare the viscosity changes of water when heated from 20°C to 100°C and discuss potential industrial implications.

   Hint

   Consider flow rates and pressure when water is less viscous.