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

How many numerical diffusion terms does the second-order upwind Euler scheme have? Correct Answer No diffusion term

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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