High temperature nonisothermal desorption in a water-salt droplet

Research output: Contribution to journalArticle

25 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

Fingerprint

Saline water
Hydrates
Desorption
desorption
Crystalline materials
salts
bubbles
Crystallization
hydrates
Salts
water
Nucleate boiling
Domes
Bubbles (in fluids)
Image sensors
Temperature
Boiling liquids
Water
Lenses
crystallization

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

Cite this

High temperature nonisothermal desorption in a water-salt droplet. / Misyura, S. Ya.

In: International Journal of Thermal Sciences, Vol. 92, 01.01.2015, p. 34-43.

Research output: Contribution to journalArticle

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AB - 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.

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