Practice Modeling Of Reynolds Shear Stress (2.3) - Computational fluid dynamics (Contd.)

Practice: Modeling of Reynolds Shear Stress

Lesson 2.3Computational fluid dynamics (Contd.)

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

Question 1.
What is Reynolds shear stress?
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Think about the relationship between stress and flow fluctuations.
Question 2.
Define closure problem in the context of turbulence.
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Remember, it relates to simplifications in modeling.
3Question 3.
What does Reynolds shear stress measure?
- A measure of density
- A measure of stress due to fluctuations
- A constant value
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Consider what stress relates to uneven flow.
4Question 4.
True or False: Eddy viscosity is essential in turbulence modeling.
- True
- False
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Think about how turbulence modifies standard viscosity.
Question 5.
If you were to design a computational fluid dynamics study on a high Reynolds number flow, what considerations would you have to take into account regarding grid size and domain scale?
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Remember how energy transfers between scales in turbulence.
Question 6.
Calculate the required grid points for a numerical simulation involving a fluid with Reynolds number 10^4. Discuss the implications of these requirements in logistics.
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Think about how grid size scales with Reynolds number in simulations.

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