Practice Boundary Layer Thickness For A Given Length (7) - Boundary Layer Theory (Contd..)

Practice: Boundary Layer Thickness for a Given Length

Lesson 7Boundary Layer Theory (Contd..)

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8 questions

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2 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 boundary layer thickness.
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Remember the relationship to surface velocity.
Question 2.
What is wall shear stress?
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Think about viscosity and surface interaction.
3Question 3.
What is the formula for boundary layer thickness?
- a) \\( 5.48 \\frac{x}{\\sqrt{Re}} \\)
- b) \\( 2 \\frac{x}{Re} \\)
- c) \\( \\frac{Re}{x} \\)
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Recall the derivation we shared.
4Question 4.
Reynolds number is used to predict the type of flow. True or False?
- True
- False
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Consider its formula and use in practical scenarios.
Question 5.
A flat plate is 2 meters long in a fluid with a viscosity of 0.002 N.s/m² and density of 1000 kg/m³. Calculate the boundary layer thickness at the end of the plate if the free stream velocity is 2 m/s.
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Substitute values carefully and watch out for unit conversions.
Question 6.
Given the same setup, what would happen to the boundary layer thickness if the viscosity decreases? Explain using the physics of laminar flow.
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Consider the relationship between viscosity, flow rate, and turbulence.

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