Practice Laminar And Turbulent Flow (contd.) (4.1)

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8 questions

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6 sample questions

Question 1.
What happens to the velocity at the wall in turbulent flow?
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Consider the boundary condition at the wall.
Question 2.
Define turbulent flow in one sentence.
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Think about how it compares to laminar flow.
3Question 3.
What is the velocity at the wall in turbulent flow?
- True
- False
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Think about real-world applications near pipe walls.
4Question 4.
The logarithmic profile is suitable for all types of surfaces.
- True
- False
- Only rough surfaces
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Consider where this profile is derived from.
Question 5.
A pipe's diameter is 15 cm. The velocity at 3 cm from the wall is found to be 50% greater than at 1 cm. Calculate the roughness coefficient k.
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Set up comparative equations and remember to account for flow interactions.
Question 6.
Another rough pipe has velocity readings of 10 m/s at 2 cm and 14 m/s at 5 cm from the wall. Derive the k value for engineering applications.
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Utilize percentage increases effectively in your final equations.

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