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Title Аn experimental study of heat and mass transfer in a falling liquid film evaporation into a cross flow of a neutral gas
Authors Lukashov, Volodymyr Kostiantynovych  
Kostiuchenko, Y.V.
Timofeev, S.V.
Ochowiak, M.
ORCID http://orcid.org/0000-0002-9952-0158
Keywords heat and mass transfer
cross flow
film apparatus
heat and mass return coefficient
neutral gas
Type Article
Date of Issue 2020
URI https://essuir.sumdu.edu.ua/handle/123456789/77944
Publisher Sumy State University
License
Citation Lukashov, V. K., Kostiuchenko, Y. V., Timofeev, S. V., Ochowiak, M. (2020). Аn experimental study of heat and mass transfer in a falling liquid film evaporation into a cross flow of a neutral gas. Journal of Engineering Sciences, Vol. 7(1), pp. F30–F38, doi: 10.21272/jes.2020.7(1).f3.
Abstract The work is devoted to the study of heat and mass transfer in a liquid film flowing down on a heated surface under conditions of evaporation into a crossflow of a gas neutral with respect to the liquid. The work aimed to experimentally determine the average heat transfer coefficients from a heated surface to the film, heat transfer and mass transfer from the film to the gas flow and to establish their dependence on the input parameters of the heat and mass transfer process. To achieve this goal, an experimental setup was created, and a research technique was developed based on the proposed mathematical model of the heat and mass transfer process. The results of the study showed that the dependences of the average heat and mass transfer coefficients on the initial liquid flow rate are extreme with the minimum values of these coefficients at the liquid flow rate, which corresponds to the critical value of the Reynolds criterion Re l cr ≈ 500, which indicates a transition from the laminar falling films to turbulent mode under the considered conditions. The dependences of the heat and mass transfer coefficients on other process parameters for both modes of film falling are established. A generalization of the experimental data made it possible to obtain empirical equations for calculating these coefficients.
Appears in Collections: Journal of Engineering Sciences / Журнал інженерних наук

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