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4 cards from this section. Quick, good the night before a test.
What is the main advantage of using Large Eddy Simulation (LES) over Direct Numerical Simulation (DNS)?
Consider the computational demands of DNS.
What does the Kolmogorov hypothesis state about small eddies?
Think about the characteristics of small scale turbulence.
What is a significant advantage of LES compared to DNS?
Think about the trade-offs between the two simulation techniques.
True or False: The Kolmogorov hypothesis suggests that small eddies are dependent on the flow geometry.
Reflect on the definition of the hypothesis.
Given a complex fluid system, design a hypothetical LES framework including the choice of grid size and turbulence model. Justify your selections based on the system’s characteristics.
Evaluate the characteristics of turbulence likely to be present in your system.
Analyze the following scenario: A large eddy forms in a flowing river. Describe the process of energy transfer from this large eddy to smaller eddies, incorporating the Kolmogorov hypothesis.
Think about how energy moves through scales in this turbulent flow.
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