4.2. Velocity Distribution in Laminar Boundary Layer

Try these first

1. 1.

   What is the formula for calculating boundary layer thickness in laminar flow?

   Hint

   Refer to the equations discussed in class.

2. 2.

   Define Reynolds number.

   Hint

   Recall its critical role in classifying flow regimes.

3. 3.

   What is the critical Reynolds number separating laminar from turbulent flow?

   • 2000
   • 1000
   • 5000

   Hint

   Think about the classification boundaries discussed.

4. 4.

   The formula for boundary layer thickness is δ = 4.64 √(x/Re). True or False?

   • True
   • False

   Hint

   Recall the formulas we derived during the lesson.

5. 5.

   A plate experiences a flow with a velocity of 1 m/s. Given the viscosity of the fluid is 0.001 Ns/m² and length of the plate is 10 m, determine the Reynolds number and if flow is laminar or turbulent.

   Hint

   Use the properties of fluid and plate dimensions to find density and compute effectively.

6. 6.

   Analyze the situation where the flow velocity increases causing boundary layer separation sooner than expected. How would this affect the drag force, and what methods can be employed to prevent it?

   Hint

   Tie in fluid dynamics principles regarding pressures and optimal design shapes.