Estimation of time of semispheroid complete evaporation for drops of aqueous solutions of salts at high temperature horizontal surface

Author(s):  V.Y. Gubarev, candidate of Sciences, Prof., Lipetsk state technical University, Lipetsk , Russia

A.G. Arzamastsev, candidate of Sciences, Prof., Lipetsk state technical University, Lipetsk , Russia

A.S. Shipulina, Lipetsk state technical University, Lipetsk , Russia, adelino4ka@inbox.ru

Issue:  Volume 50, № 4

Rubric:  Physics. Mathematical modeling

Annotation:  The article based on the analysis of the available literature identifies the fact that drops of salt solutions evaporate faster than drops of distilled water, while the salt concentration increase reduces time of evaporation. The relevance of the study is determined by the absence of data on complete evaporation time of the drop conditional on the initial salt concentration. The article proposes a form of analytical dependence of the full evaporation time on the initial salt concentration for a semispherical drop of an aqueous salt solution placed on a high-temperature horizontal surface to the nearest coefficient, which can be a function of the initial volume of the drop and the surface temperature. The coefficient values for solutions of NaCl and CaCl2 salts are determined by experimentation. The factor analysis has been conducted and insignificance of initial volume and surface temperature for this coefficient value is obtained. The coefficient value depends only on salt type. The regression analysis showed a good harmonization for experimental data and the obtained dependences which determine the time of complete evaporation for drops of aqueous salt solutions

Keywords:  high temperature surface, the time of complete evaporation, the initial concentration of salt

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