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Numerical diffusion causes __________

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in Computational Fluid Dynamics by (118k points)
Numerical diffusion causes __________

(a) smearing of sharp gradients

(b) oscillations

(c) undershoots and overshoots

(d) inaccuracy

The question was asked in final exam.

Asked question is from Convection-Diffusion Problems in section Convection-Diffusion Problems of Computational Fluid Dynamics

1 Answer

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Best answer
Right answer is (a) smearing of sharp gradients

The best explanation: The sources of numerical errors caused by the convection flux can be divided into two – numerical diffusion and numerical dispersion. The numerical diffusion leads to smearing of sharp gradients.

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