Evaporation of droplets sprayed into an immiscible liquid

A. Ullmann*, R. Letan

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


The present work relates to dilute spray systems where interaction between droplets or bubbles does not take place. The analysis of a single droplet-bubble projects in such cases on the whole spray system. Photographs of colored droplets evaporating into colorless bubbles have illustrated splashing of the liquid inside the bubble, and the non-regular instantaneously varying shapes of the evaporating bubble. Close to the spray nozzle the droplet accelerates from rest towards its terminal velocity. Further up, as the fraction of vapor increases the bubble accelerates due to its decreasing density. Finally, the shape distortion and the large drag balances the reduced density, and a constant velocity is reached. Integration of the velocity yields the bubble path and the height needed for complete evaporation.

Original languageEnglish
Pages (from-to)537-541
Number of pages5
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
StatePublished - 1989
Externally publishedYes
EventHeat Transfer Phenomena in Radiation, Combustion, and Fires - Philadelphia, PA, USA
Duration: 6 Aug 19899 Aug 1989


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