1.5. Fluid Deformation Between Parallel Plates

Try these first

1. 1.

   What is viscosity?

   Hint

   Think about how syrup moves versus water.

2. 2.

   Define shear stress.

   Hint

   Remember the concept of force and surface area.

3. 3.

   What happens to shear stress if the fluid viscosity increases?

   • It decreases
   • It remains constant
   • It increases

   Hint

   Consider what viscosity measures.

4. 4.

   Fluid deformation occurs continuously until what condition is met?

   • True
   • False

   Hint

   Think about the characteristics of fluids under force.

5. 5.

   A fluid with a viscosity of 0.9 Pa.s is coaxed between two plates 0.1 m apart. If the top plate moves at 2 m/s, find the shear stress.

   Hint

   Remember to rearrange and apply appropriate units.

6. 6.

   During an experiment, a fluid at 20°C has a dynamic viscosity of 1.2 Pa.s. How much force is required to move a plate of area 0.5 m² at a velocity of 3 m/s if t = 0.05m?

   Hint

   Make sure to calculate each component step by step.