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In FVM methods, cut-off width depends on ____________

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in Computational Fluid Dynamics by (118k points)
In FVM methods, cut-off width depends on ____________

(a) the PDE

(b) the algebraic equation

(c) the grid-size

(d) the discretization method

I have been asked this question in my homework.

My question is taken from Large Eddy Simulation for Turbulent Models in section Turbulence Modelling of Computational Fluid Dynamics

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Correct choice is (c) the grid-size

The best I can explain: When we use the finite volume method, it is pointless to use a cut-off width which is smaller than the grid size. If such cut-off width is chosen, the accuracy of the method in capturing the eddies will be affected.

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