4.5.3. Apparent Viscosity in Non-Newtonian Fluids

Try these first

1. 1.

   Define viscosity and give an example.

   Hint

   Think about how easily these fluids flow.

2. 2.

   What are non-Newtonian fluids?

   Hint

   Consider how some fluids behave under stress.

3. 3.

   What is viscosity?

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

   Hint

   Consider how thick or thin a liquid is.

4. 4.

   True or False: All fluids are Newtonian.

   • True
   • False

   Hint

   Recall the examples of toothpaste and water.

5. 5.

   You have a fluid that behaves as a pseudoplastic. Describe how its viscosity would change during a mixing process under increased shear rates.

   Hint

   Think about how toothpaste responds when you squeeze the tube.

6. 6.

   A manufacturer is creating a new paint that behaves as a dilatant fluid. What challenges might they face in its application?

   Hint

   Consider how dilatant fluids react under force.