High temperature nonisothermal desorption in a water-salt droplet

S. Ya Misyura

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Experimental data on dynamics of nucleate boiling in the droplets of LiBr water solution were obtained. Time dependences for a change in bubble geometry were determined and characteristic desorption regimes were distinguished. The rate of bubble growth decreases with a rise in salt concentration and boiling stops completely at high concentration of LiBr. An increase in salt concentration in a liquid layer of the bubble bottom leads to a considerable decrease in the rate of desorption, and the rate of bubble diameter increase decreases significantly, and a dry spot is not formed. The growth features of the crystalline-hydrate film depend on the rate of crystallization. Thermal measurements were carried out by means of thermal imager lenses with ten-fold magnification. The video and thermal recording allowed us to distinguish the self-organized crystalline-hydrate structures at high crystallization rates: rod-like, dendrite, and dome-shaped ones. Complex morphology of these structures promotes an increase in the rate of water desorption from the surface of crystalline-hydrate film.

Original languageEnglish
Pages (from-to)34-43
Number of pages10
JournalInternational Journal of Thermal Sciences
Volume92
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Keywords

  • Desorption
  • Marangoni force
  • Nucleate boiling droplet
  • Water-salt solution

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

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