Application of heated-thin-foil thermography technique to external convective microscale flows

A heated-thin-foil thermography technique is applied to an external convective microscale flow. The experimental technique and analysis are developed in the context of an external jet impingement flow. Results indicate that lateral conduction along the heated impingement surface is significant and should be included in calculating the heat transfer coefficient. Detailed profiles of heated and adiabatic wall temperature, and local Nusselt number variations are presented for a single 125 µm diameter air jet.