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The numerical dispersion term of the second-order upwind Euler scheme is of ____________

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The numerical dispersion term of the second-order upwind Euler scheme is of ____________

(a) third-order

(b) second-order

(c) first-order

(d) no dispersion

I had been asked this question during an online interview.

The origin of the question is Transient Flows topic in chapter Transient Flows of Computational Fluid Dynamics

1 Answer

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Best answer
The correct option is (a) third-order

The best explanation: When the terms in the discretized form of the transient term using the second-order upwind Euler scheme is further expanded with the Taylor series expansion, the dispersion term of the third order arises.

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