2.5. Overall Summary of LES

Try these first

1. 1.

   What is Large Eddy Simulation?

   Hint

   Think about how it relates to turbulence.

2. 2.

   What does DNS stand for?

   Hint

   Consider what 'Direct' implies about simulation.

3. 3.

   What does LES stand for?

   • Large Eddy Simulation
   • Layered Energy Simulation
   • Lingering Eddy Simulation

   Hint

   The acronym suggests a focus on large turbulent structures.

4. 4.

   True or False: LES directly computes all scales of turbulence.

   • True
   • False

   Hint

   Think about how LES differs from DNS.

5. 5.

   How would you apply LES to model turbulent airflow in an aircraft engine? Discuss the computational considerations.

   Hint

   Consider how LES balances accuracy and computational load in high-stakes designs.

6. 6.

   Design an experiment to measure the effectiveness of subgrid-scale models in LES versus DNS.

   Hint

   Think about which parameters would highlight differences in scale resolutions.