Practice Shear Stress In Turbulent Flow (2.2) - Laminar and Turbulent Flow

Practice: Shear Stress in Turbulent Flow

Lesson 2.2Laminar and Turbulent Flow

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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.
What is shear stress?
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Think about forces acting along the surface.
Question 2.
What are the two components of shear stress in turbulent flow?
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One is due to viscosity and the other due to turbulence.
3Question 3.
What is the main difference between shear stress in laminar and turbulent flow?
- It only includes viscous stress in laminar flow.
- It includes only turbulent stress in turbulent flow.
- They are the same.
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Remember the nature of fluid flow in each type.
4Question 4.
True or False: Turbulent shear stress is only based on viscous stress.
- True
- False
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Consider what 'turbulent' adds to the analysis.
Question 5.
Consider a turbulent flow in a pipe of diameter D with a velocity gradient. Explain how you would calculate the total shear stress at a point in the flow using mixing length theory.
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Remember to relate the mixing length to the velocity profile.
Question 6.
Analyze the implications of turbulent shear stress on energy losses in a pipe system. How would this influence pipe design?
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Consider practical engineering applications and perform a qualitative analysis.

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