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Dropwise Evaporative Cooling.

pdf icon Dropwise Evaporative Cooling. (1312 K)
diMarzo, M.

Universita degli Studi di Bologna. National Heat Transfer Conference, XIII UIT. Proceedings. ATTI 13 Congresso Nazionale Sulla Transmissione Del Calore. Giugno 22-23, 1995, Bologna, Italy, 3-25 pp, 1995.


National Institute of Standards and Technology, Gaithersburg, MD


evaporative cooling; droplets; solid surface; thermal conductivity; solids; sprays


A comprehensive review of the findings that punctuated ten years of research on dropwise evaporative cooling is presented. The first studies consider a single droplet evaporating on a high thermal conductivity solid surface. The solid-liquid coupling is addressed when considering the case of a low thermal conductivity solid. A powerful, non-intrusive, infrared thermographic technique is instrumental in describing the thermal behavior of the solid surface. The applications relevant to fire suppression suggest the input of radiant heat from above the surface instead of heat conducted through the solid. Once the single droplet behavior is fully documented experimentally and accurately modelled, the study of sparse water sprays is undertaken. A superposition model is formulated which well represents the experimental data.