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← ScienceWhich outcome results when increasing channel roughness impacts laminar flow modeled with Poiseuille's equation?
A)Increased pressure drop is necessary✓
B)Bulk fluid temperature decreases rapidly
C)Flow becomes nearly fully turbulent
D)Channel erosion by accelerated cavitation
💡 Explanation
Increased roughness increases the viscous effects, invoking a larger pressure gradient through heightened friction, because Poiseuille's equation assumes constant viscosity; therefore, increased pressure drop is needed rather than cavitation near the walls.
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