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LES uses _____________

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in Computational Fluid Dynamics by (118k points)
LES uses _____________

(a) spatial filtering

(b) time averaging

(c) ensemble averaging

(d) reynolds averaging

I have been asked this question in quiz.

This interesting question is from Large Eddy Simulation for Turbulent Models in chapter Turbulence Modelling of Computational Fluid Dynamics

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The correct option is (a) spatial filtering

To explain I would say: Les captures large eddies only. So, spatial filtering is used to separate the large and small eddies. A filtering function and the cut-off width above which the flow will be solved are selected before solving the flow.

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