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Which consequence results when injecting dye to visually observe laminar flow transitions at higher Reynolds numbers?

A)Underestimated critical transition velocity
B)Overestimated inlet development length
C)Premature turbulent flow observation
D)Reduced coefficient of entry length

💡 Explanation

Premature turbulence occurs because injecting dye introduces disturbances. These amplify via Kelvin-Helmholtz instability, causing the transition to turbulence to occur at lower Reynolds numbers rather than what would happen without disturbance; therefore we observe turbulence earlier.

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