In this study, experimental research is conducted, analysing the behaviour of small water droplets (from 10 to 50μl) gently deposited on hot, non-porous surfaces. In particular, the conditions which determine the onset of nucleate and filmboiling are emphasized, and the solid surface cooling is monitored via infrared thermography. The results (concerning the evaporation time of the droplets and the solid surface transient temperature distribution) are also compared with the data obtainedby the same authors during the analysis of droplet evaporation in total absence of nucleate and film boiling. In order to stress the different behaviour of the evaporating droplet as a function of the solid surface thermal conductivity, evaporativetransients on stainless steel and macor (a glass-like, low-conductivity material) are considered.
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