16.5.2. Application of Fluid Mechanics in Economic Models

Try these first

1. 1.

   What is shear stress?

   Hint

   Think about the interaction of fluid layers.

2. 2.

   Define Reynolds number.

   Hint

   It's a dimensionless number used in fluid mechanics.

3. 3.

   What does the Reynolds number indicate?

   • Velocity of flow
   • Turbulence of flow
   • Viscosity of fluid

   Hint

   What does it measure the balance between?

4. 4.

   True or False: Shear stress can be expressed as force per unit area.

   • True
   • False

   Hint

   Think about the definition of shear stress.

5. 5.

   Derive the expressions for Reynolds number and Euler number in terms of force and viscosity.

   Hint

   Break it down into the fundamental definitions of each number.

6. 6.

   Using data from a real-world scenario, calculate the power required to overcome drag on a vehicle at a known velocity. Explain the process.

   Hint

   Use the drag force formula and think about standard air density conditions.