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← ScienceWhich outcome results when computational fluid dynamics (CFD) simulations underestimate mesh Reynolds number?
A)Resolved turbulent vortices become overestimated
B)Numerical diffusion artificially increases✓
C)Computational runtime greatly decreases
D)Solution accuracy demonstrably exceeds expectations
💡 Explanation
Numerical diffusion increases when mesh Reynolds number is underestimated because energy dissipation becomes artificially enhanced by numerical errors. Therefore solution accuracy will be lower, rather than higher allowing physically accurate turbulence modeling.
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