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â ScienceWhich outcome occurs when a control valve rapidly shuts in a hydraulic system linked to a long pipeline?
A)Cavitation bubble minimizes system wear
B)Water hammer pressure surge occursâ
C)Fluid viscosity sharply decreases
D)Reynolds number remains relatively stable
đĄ Explanation
A rapid valve closure dramatically alters fluid momentum and the local pressure because the momentum change can be modeled by the Joukowsky equation, leading to water hammer. Therefore a pressure surge appears, rather than cavitation, and the Reynolds number can change quickly.
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