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← ScienceWhich outcome occurs when turbulent flow exceeds 4000 Reynolds?
A)Increased kinetic energy dissipation rates✓
B)Decreased convective heat transfer rate
C)Laminar sublayer thickness increases
D)Reduced drag due separated boundary
💡 Explanation
An increase in dissipation occurs because, above 4000 Reynolds, increasing turbulence causes heightened shear stress through viscous forces; therefore, more kinetic energy is transferred into internal energy, rather than drag reduction, which might occur differently at lower Reynolds numbers.
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