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Which consequence results when dissolved polymer chains break within turbulent flow?

A)Reduced drag reduction effectiveness
B)Increased fluid boundary-layer separation
C)Enhanced momentum transfer across layers
D)Elevated local fluid pressure peaks

💡 Explanation

When polymer chains break due to strong shear forces in turbulence, drag reduction diminishes because the Elongational Viscosity mechanism is compromised. Therefore drag reduction weakens, rather than enhancement because large polymer chains no longer effective, different from viscosity.

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