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How many numerical diffusion terms does the second-order upwind Euler scheme have?

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in Computational Fluid Dynamics by (118k points)
How many numerical diffusion terms does the second-order upwind Euler scheme have?

(a) Infinity

(b) No diffusion term

(c) One term

(d) Two terms

I got this question by my college director while I was bunking the class.

The query is from Transient Flows topic in section Transient Flows of Computational Fluid Dynamics

1 Answer

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Correct answer is (b) No diffusion term

The explanation is: The transient term discretization also has similar properties like the convection term discretization. The second-order upwind Euler scheme does not have any numerical diffusion or anti-diffusion terms. These terms are present for the first-order schemes only.

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