2.2. Non-zero Vorticity

Try these first

1. 1.

   What is the transition zone in fluid flow?

   Hint

   Think about the relationship with the Reynolds number.

2. 2.

   Define laminar sub-layer.

   Hint

   Where do we assume constant shear stress?

3. 3.

   What happens to the Reynolds number as fluid moves downstream?

   • It increases
   • It decreases
   • It remains constant

   Hint

   Think about how speed influences flow characteristics.

4. 4.

   True or False: The velocity profile in the laminar sub-layer is assumed to be linear.

   • True
   • False

   Hint

   Consider the definition of the laminar sub-layer.

5. 5.

   Explain how the transition from laminar to turbulent flow affects energy losses in a piping system.

   Hint

   Think about how many variables are in play during transitions between flow types.

6. 6.

   Calculate the displacement thickness for a flow with a known velocity profile across a flat plate.

   Hint

   Remember the definitions of thickness and how they relate to flow velocity and area.