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← ScienceWhich mechanism causes deviations from ideal predictions when the Navier-Stokes equation is applied to turbulent flow around an airfoil?
A)Eddy viscosity momentum transfer✓
B)Molecular diffusivity energy dissipation
C)Surface tension capillary action
D)Laminar boundary layer separation
💡 Explanation
Eddy viscosity momentum transfer becomes significant at high Reynolds numbers, because turbulent eddies mix momentum across the flow more effectively than molecular viscosity. Therefore, simulations underpredict actual drag, rather than effects predicted by the laminar equation.
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