Droplet Cooling: Theory, Experiments and Models.

This work is aimed at presenting a comprehensive review of the cooling effect that liquid droplets induce on hot solid surfaces. In particular, the review addresses theoretical results, experimental studies and modeling approaches, highlighting fundamental results from early studies as well as important contributions from recent research approaches. The characteristics of sessile and impinging droplets are presented, and the governing parameters of both cases of droplet cooling are pointed out. Although a very large number of significant works is shown to be available, this study emphasizes the need to unify the experimental research and the modeling efforts in order to provide better predictive correlations.A final part of this paper focuses on recent experimental results obtained by the non-intrusive method of infrared thermography, which appears to be very promising in terms of useful information for modeling efforts and improvements of cooling efficiency.