3.1. Comparison with Laminar Flow Profile

Try these first

1. 1.

   What is the shape of a laminar flow profile?

   Hint

   Think about how the velocity distributes across the section.

2. 2.

   Define 'velocity defect'.

   Hint

   Related to the terms discussed, especially in turbulent scenarios.

3. 3.

   What is the velocity profile of laminar flow?

   • Parabolic
   • Logarithmic
   • Exponential

   Hint

   It's named after a famous fluid dynamic principle.

4. 4.

   True or False: Turbulent flow has a linear velocity profile.

   • True
   • False

   Hint

   Think of the characteristic shapes we discussed.

5. 5.

   Given a turbulent flow in a pipe, calculate the shear stress if the velocity defect at a specific radius is 2 m/s and the fluid density is 800 kg/m³.

   Hint

   Focus on deriving u* first using the velocity defect.

6. 6.

   If the height of surface irregularities is 0.1 mm and the viscous sublayer thickness is measured at 0.4 mm, classify the boundary as smooth, rough, or transitional.

   Hint

   Refer to the classification criteria discussed in class.