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Which of these is correct about the QUICK scheme?

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in Computational Fluid Dynamics by (118k points)
Which of these is correct about the QUICK scheme?

(a) Stable and bounded

(b) Stable and unbounded

(c) Unstable and bounded

(d) Unstable and unbounded

This question was addressed to me by my college professor while I was bunking the class.

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

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Correct choice is (d) Unstable and unbounded

Easiest explanation: The QUICK scheme is not bounded. It involves undershoots and overshoots. The main coefficients (immediate eastern and western coefficients) are not guaranteed to be positive. The coefficients aEE and aWW are negative. Therefore, the solution is not stable.

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