Evaporation of ventilated water droplet: connection between heat and mass transfer

Heat and mass transfer from evaporating water droplets has been investigate d using a wind tunnel technique. The results were compared with results of other authors and correlated by an empirical fit proposed by Clift, Grace, and Weber (Bubbles, Drops, and Particles, Academic Press, New York, 1978 [C hapters 3 and 5]), It was found that the fit gave reasonably accurate predi ctions for Reynolds numbers Re ranging from 0 to 400, The accuracy of the o btained expression was tested comparing measured and calculated droplet tem peratures. The results agree always within 5% and usually even within 1%. T his represents an experimental validation for mass and heat flux expression s commonly used in condensation and evaporation studies. (C) 2001 Elsevier Science Ltd. All rights reserved.