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Which outcome concerning fluid transit occurs when the Reynolds number increases beyond a critical number in a pipeline?

A)Onset of turbulent flow regime
B)Increased laminar flow stability limit
C)Decreased frictional pressure drop
D)Reduced thermal boundary layer thickness

💡 Explanation

An increase in the Reynolds number indicates the inertial forces dominate, facilitating a transition to turbulence. This is because inertia overcomes viscous damping; therefore, the flow becomes turbulent rather than remaining laminar, which occurs at lower Reynolds numbers.

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