4.5.2. Non-Newtonian Fluids

Try these first

1. 1.

   Define non-Newtonian fluid in one sentence.

   Hint

   Think about how they differ from Newtonian fluids.

2. 2.

   What is a pseudoplastic fluid?

   Hint

   Examples include ketchup and paint.

3. 3.

   What defines a non-Newtonian fluid?

   • It has a constant viscosity
   • Its viscosity changes with shear rate
   • It always increases in viscosity

   Hint

   Remember how they differ from Newtonian fluids.

4. 4.

   True or False: All non-Newtonian fluids behave the same way under shear stress.

   • True
   • False

   Hint

   Consider the examples we discussed.

5. 5.

   A fluid exhibits a shear stress of 3 Pa and a shear rate of 0.5 s^-1. If it behaves like a pseudoplastic fluid, what would be its viscosity?

   Hint

   Remember to use the formula for viscosity!

6. 6.

   In a practical application, why is it crucial to understand the flow behavior of dilatant fluids in machinery manufacturing?

   Hint

   Consider how these fluids would behave under sudden loads.