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← ScienceWhich flow state arises when pipe diameter decreases, holding other parameters constant?
A)Transition to turbulent flow✓
B)Viscosity experiences exponential decay
C)Pressure wave speed decreases
D)Wall shear stress remains uniform
💡 Explanation
Decreasing diameter increases fluid velocity, therefore increasing the Reynolds number; at a high Reynolds number the inertial forces dominate viscous forces, leading to transition to turbulent flow rather than maintaining laminar due to viscous damping.
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