Practice Reynolds Shear Stress (1.6) - Laminar and Turbulent Flow (Contd.)

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9 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
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define shear stress.
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Think about forces and areas.
Question 2.
What does eddy viscosity represent?
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Consider how turbulence creates additional resistance.
3Question 3.
What is the formula for Reynolds shear stress?
- -ρ⟨u'v'⟩
- -ρ⟨u'v'⟩²
- ρ⟨u'v'⟩
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Look for the expression involving the average products of fluctuating components.
4Question 4.
Eddy viscosity is independent of the flow's conditions. (True/False)
- True
- False
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Consider how turbulence affects the fluid's behavior.
Question 5.
Calculate the Reynolds shear stress for a flow with velocity fluctuations u' = 0.1 m/s and v' = 0.05 m/s, given density 1000 kg/m³.
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Apply the Reynolds formula and don't forget to handle signs.
Question 6.
Explain how increasing turbulent flow impacts viscous shear stress across the pipe's radius in a given scenario.
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Think about flow profiles in turbulent conditions.

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