3.2. Outer Flow Region

Try these first

1. 1.

   Define the term 'outer flow region'.

   Hint

   Think about how velocity changes in relation to viscosity.

2. 2.

   What is the no-slip boundary condition?

   Hint

   Consider where the fluid meets the surface.

3. 3.

   What occurs in the outer flow region?

   • Variable velocity
   • Constant free-stream velocity
   • Rotational flow

   Hint

   Consider the characteristics of flow above the boundary layer.

4. 4.

   True or False: Shear stress has a significant effect in the outer flow region.

   • True
   • False

   Hint

   Reflect on how viscosity interacts with flow characteristics.

5. 5.

   Consider a rectangular plate in a fluid flow. Calculate the boundary layer thickness at a distance of 1 meter from the leading edge when the free stream velocity is 10 m/s and kinematic viscosity is 0.001 m²/s.

   Hint

   Recall the relationship between viscosity, free stream velocity, and distance.

6. 6.

   A ship moving through water experiences different flow regions. If the Reynolds number for its hull reaches 6 x 10^5, discuss the transition from laminar to turbulent flow concerning the boundary layer and outer flow region.

   Hint

   Consider the implications of Reynolds number in flow classification.