1. Boundary Layer Transition

Try these first

1. 1.

   What is a laminar boundary layer?

   Hint

   Think about how fluid particles behave in layers.

2. 2.

   Define boundary layer thickness.

   Hint

   Consider how far the influence of the boundary extends.

3. 3.

   What defines the transition zone from laminar to turbulent flow?

   • Increase in temperature
   • Decrease in velocity
   • Increase in Reynolds number

   Hint

   Consider how fluid characteristics change downstream.

4. 4.

   True or False: The laminar sub-layer completely eliminates the effects of turbulence above it.

   • True
   • False

   Hint

   Think about how layers interact rather than eliminate each other.

5. 5.

   A plate has a boundary layer with a thickness of 0.02m. Calculate the percentage velocity deficit at a point where the flow is 70% of the free stream velocity.

   Hint

   Understand the concept of velocity profiles and how they interact with boundary layers.

6. 6.

   Using the definitions of momentum thickness and energy thickness, derive expressions comparing their values using the same flow conditions.

   Hint

   Think critically about conservation principles in fluid flow.