Practice Large Eddy Simulation (1) - Large Eddy Simulation - Hydraulic Engineering - Vol 3

Practice: Large Eddy Simulation

Lesson 1Large Eddy Simulation

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9 questions

Flashcard drill
4 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 does LES stand for?
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Remember the main terms associated with turbulence.
Question 2.
What is the primary advantage of using LES over DNS?
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Consider the resource demands of each technique.
3Question 3.
What is the purpose of Large Eddy Simulation?
- To resolve all turbulent scales without approximation.
- To model the behavior of large eddies while approximating smaller ones.
- To simplify the Navier-Stokes equations for non-turbulent flows.
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Think about the relationship between accuracy and efficient computation.
4Question 4.
True or False: In LES, small eddies are fully resolved without approximation.
- True
- False
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Consider what LES focuses on versus what is approximated.
Question 5.
Considering a theoretical turbulent flow field, describe how you would set up a grid for LES, detailing considerations for both large and small eddies.
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Think about size ratios and the relationship with physical flow characteristics.
Question 6.
Discuss the implications of Kolmogorov's hypothesis on LES and its challenges in developing a universal turbulence model.
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Reflect on the relationship between universal behaviors and modeling accuracy.

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