Which boundary layer behavior leads to inaccurate readings when hot-wire anemometry measures turbulent airflow past an airfoil?

💡 Explanation

Hot-wire anemometry relies on the cooling effect of laminar flow; deviation arises when laminar flow transitions to turbulent flow. Because increased mixing elevates convective heat transfer (violating the Bernoulli equation's laminar assumptions, influencing sensor readings,) turbulent conditions alter temperature profiles rather than uniform gradients. Therefore transition causes that error, more prominently than viscosity.

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