Open AccessExperimental study of change of average velocity in a drop on crystalization
Author(s) -
В. С. Морозов
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1677/1/012090
Subject(s) - drop (telecommunication) , convection , materials science , mechanics , thermodynamics , aqueous solution , chemistry , physics , telecommunications , computer science
The behavior of convection dynamics during high-temperature heating inside a drop of an aqueous solution of LiBr salt at the moment of crystalline-hydrated crust movement was studied experimentally. To measure the instantaneous velocity fields in the horizontal section of a sedentary drop, the optical PIV method was used. The measurement of convection velocity in a drop through a thick crust of crystalline hydrates did not affect the accuracy of measurements. The maximum average velocity U Av is equal to 0.39-0.42 mm/s was realized at the initial time. Over 30-35 s the temperature gradient decreases due to heating of the solution by 3.5 times which led to a decrease in U Av by 3-4 times. After 32 s heat transfer and evaporation enter quasi-stationary mode.