13. Fluid Mechanics

Try these first

1. 1.

   Define the term 'boundary layer'.

   Hint

   Think about the surface where the fluid touches.

2. 2.

   What does the Reynolds number help to determine?

   Hint

   It's a ratio involving inertial and viscous forces.

3. 3.

   What is the primary characteristic of a laminar boundary layer?

   • Smooth and orderly flow
   • Chaotic and irregular flow
   • Only occurs in liquids

   Hint

   Think about the arrangement of fluid layers.

4. 4.

   True or False: The displacement thickness always equals the boundary layer thickness.

   • True
   • False

   Hint

   Consider how displacement influences flow behavior.

5. 5.

   A flat plate experiences a laminar flow at a Reynolds number of 4.5 x 10^4. Compute the displacement thickness at a location where the distance from the leading edge is 0.5m.

   Hint

   Use the equation for displacement thickness related to Reynolds number.

6. 6.

   Discuss how the development of Computational Fluid Dynamics (CFD) has impacted the analysis of boundary layers compared to classical methods.

   Hint

   Consider the evolution from manual calculations to automated simulations.