Share

Evaporation of a droplet in free fall in air.

Evaporation d'une gouttelette en chute libre dans l'air.

Author(s) : GUELLA S., ALEXANDROVA S., SABONI A.

Type of article: Article

Summary

The study concerns the effect of evaporation on the instantaneous velocity of a drop with a diameter less than one millimetre in free fall in the air. The experimental set-up is made of a 2.6 m column in which temperature and hygrometrics are controlled. At the top of the column, a generator makes it possible to produce quasi-identical droplets with diameters less than one millimetre. An optical device with double detection levels makes it possible to measure the instantaneous velocity of the droplet at several positions in the column. Measurements were taken on droplets of liquid with various physical and chemical characteristics: water, 2-ethyl-1-hexanol, ethanol and acetone. On the other hand, a simple model was developed, which takes into account the movement and transfer of matter and heat at the level of the droplet in free fall. This model is valid for Reynolds numbers under 400. The comparison of the results of the model presents a good concordance with experimental points in literature and with our experimental results. [Reprinted with permission from Elsevier. Copyright, 2007].

Details

  • Original title: Evaporation d'une gouttelette en chute libre dans l'air.
  • Record ID : 2008-1554
  • Languages: French
  • Source: International Journal of thermal Sciences - vol. 47 - n. 7
  • Publication date: 2008/07

Links


See other articles in this issue (2)
See the source

Indexing