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← ScienceWhich outcome occurs when the Reynolds number exceeds a critical threshold in a pipe network designed using the Darcy-Weisbach equation?
A)Laminar flow becomes fully turbulent
B)Friction factor estimation becomes unreliable✓
C)Viscosity gradients become negligible
D)Pressure drop predictions improve substantially
💡 Explanation
Exceeding the critical Reynolds number induces transitional or turbulent flow, making the friction factor estimation in the Darcy-Weisbach equation unreliable because that equation assumes a certain level of flow stability; therefore estimations become inaccurate rather than more precise, under these unstable conditions.
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