Which consequence results when a fluid's viscosity decreases while velocity increases across a constriction, violating the Hagen-Poiseuille equation?

💡 Explanation

Increased velocity and reduced viscosity escalate the Reynolds number in the constricted passage, shifting the flow regime toward turbulence because inertial forces outweigh viscous forces during such divergence; therefore, flow becomes non-laminar rather than remaining stable or experiencing altered shear stress.

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