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Which of these is correct for a QUICK scheme?

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Which of these is correct for a QUICK scheme?

(a) False diffusion is zero

(b) False diffusion is small

(c) False diffusion is big

(d) False diffusion is infinity

The question was posed to me in an online quiz.

Origin of the question is Convection-Diffusion Problems topic in chapter Convection-Diffusion Problems of Computational Fluid Dynamics

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Correct option is (b) False diffusion is small

The explanation: The QUICK scheme involves one downwind node also. So, there will be a false-diffusion in this method. But this false diffusion value is not big as it is an upwind biased scheme (extra nodes in the upstream than the downstream).

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