2015 1(16)

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   Short abstract

 

Pages:

39 - 42

Language:

RU

Ref.:

12


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2015_1(16)_7.pdf

 

 

BOILING CRISIS OF WATER SALT SOLUTION DROPLETS

Nakoryakov V.E., Misyura S.Ya., Ovchinnikov V.V.

Institute of Thermophysics SB RAS, Novosibirsk, Russia


Citation:

Nakoryakov, V.E., Misyura, S.Ya. and Ovchinnikov, V.V., (2015) Boiling crisis of water salt solution droplets, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(16), PP. 39 - 42.


Keywords:

nucleate boiling droplets; water-salt solution; desorption; boiling crisis


Abstracts:

The behavior of a drop of lithium bromide solution on a heating surface is investigated in a wide range of surface temperatures and solution concentration. Substantial peculiarities of evaporation and boiling of single drops in the lithium bromide solution are revealed. The behavior of salt solutions and suspension differs absolutely from the behavior of one-component liquids. At a temperature of higher than 150 °C, there occurs explosive destruction of the batch immediately upon depositing the drop on the surface, we observe volume boiling crisis. Some part of the liquid is removed and the drop shape looks again like a pancake, followed by diffusion evaporation.
At a temperature of higher than 150 °C, we can clearly observe formation of the rod structures, which are rapidly transformed to the dendrite and then to the netlike and dome-shaped structures. The transition from slow to fast crystallization is accompanied by a change in morphology of structures. Formation of new ordered crystalline structures is efficient from the point of energy because this intensifies vapor desorption and reduces significantly total time of desorption.


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