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Which of these models compute large vortexes directly while neglecting small scale eddies?

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Which of these models compute large vortexes directly while neglecting small scale eddies?

(a) DNS

(b) LES

(c) RANS

(d) FANS

I got this question in a national level competition.

My question is taken from Turbulence Modelling in division Boundary Layers, Laminar & Turbulent Boundary Layers, Navier Stokes Solutions of Aerodynamics

1 Answer

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Best answer
Correct choice is (b) LES

For explanation I would say: In Large Eddy simulation, large eddies are computed by resolving large time and length scales. In LES, the smaller length scales are ignored making it an economical and less time consuming than DNS.

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