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Which of these filters is commonly used in FVM models?

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Which of these filters is commonly used in FVM models?

(a) Gaussian filter

(b) Top-hat filter

(c) Spectral cut-off filter

(d) Gaussian and spectral cut-off filter

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I'd like to ask this question from Large Eddy Simulation for Turbulent Models topic in division Turbulence Modelling of Computational Fluid Dynamics

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Correct option is (b) Top-hat filter

The best I can explain: The top-hat or box filter is the one which is preferred for the finite volume methods in CFD packages. This is because of their simple elimination of small eddies. The Gaussian and spectral cut-off filter are used for research purposes.

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