Practice Boundary Layer Theory (contd..) (1.1) - Boundary Layer Theory (Contd..)

Practice: Boundary Layer Theory (Contd..)

Lesson 1.1Boundary Layer Theory (Contd..)

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8 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define the term 'boundary layer'.
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Think about the effect of viscosity near surfaces.
Question 2.
What does the Reynolds number indicate in fluid flow?
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Consider its formula and significance.
3Question 3.
What is the main factor determining the flow type in boundary layer theory?
- Pressure gradient
- Reynolds number
- Shear stress
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Recall how the flow behaves under different Reynolds numbers.
4Question 4.
True or False: A negative du/dy value at the wall indicates that flow has separated.
- True
- False
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Think about the consequences of separation.
Question 5.
A fluid with a viscosity of 0.001 Ns/m² flows over a flat plate of 2m length. If the velocity at the edge of the boundary layer is 0.2 m/s, calculate the boundary layer thickness at this point, and discuss how changing viscosity would affect separation.
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Calculate Re before using thickness formula.
Question 6.
You have two flow profiles: one with higher velocities and high adverse pressure gradients; the other with lower velocities and favorable gradients. Explain how each affects boundary layer separation.
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Focus on pressure gradient effects on flow behavior.

4 more questions in this section. Enroll free to practise them all.