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Interfacial Phenomena and Heat Transfer
ESCI

ISSN 印刷: 2169-2785
ISSN オンライン: 2167-857X

Open Access

Interfacial Phenomena and Heat Transfer

DOI: 10.1615/InterfacPhenomHeatTransfer.2018025168
pages 251-261

EFFECT OF THE SIZE OF DROPLETS ON EVAPORATION

Vladimir Borodulin
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
Mikhail Nizovtsev
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia

要約

In this paper, based on theoretical modeling, the effect of an accommodation coefficient on the evaporation of water droplets is analyzed. Analysis of the influence of convective heat and mass transfer, as well as radiant heat transfer, on the temperature and evaporation time of droplets is carried out. The results of the calculations showed that the accommodation coefficient exerts a weak influence on the evaporation of large millimeter drops. The evaporation time of large droplets varies insignificantly; these droplets have time to cool down to the wet-bulb temperature. The accommodation coefficient strongly affects the evaporation of small submillimeter droplets. These droplets cannot cool down to the wet-bulb temperature during evaporation. It is shown that radiant heat transfer leads to an increase in the droplet temperature during the main evaporation stage and prevents cooling to the wet-bulb temperature. Conversely, convective heat transfer promotes a decrease in the droplet temperature to the wet-bulb temperature.


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