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Which outcome occurs when a fluid exceeds transitional Reynolds number?

A)Laminar flow becomes unstable, forms turbulence
B)Fluid viscosity increases exponentially
C)Pressure drop decreases linearly along pipe
D)Boundary layer thickness steadily decreases

💡 Explanation

When the Reynolds number surpasses the critical threshold, inertia overwhelms viscosity, triggering turbulence via the mechanism of transition. Therefore flow instability leads to chaotic mixing, rather than viscosity changes or laminar flow, because inertial forces are dominant.

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