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Flow Regimes of a Liquid Film Carried Away by a Gas Flow in a Flat Horizontal Channel under Isothermal Conditions

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Abstract

A three-dimensional mathematical model of the flow of a liquid film carried away by a gas flow in a flat horizontal minichannel under isothermal conditions is developed. Film flow regimes in an evaporative cooling system are simulated numerically. Dependences of the development of deformation on the motion control parameters such as the Reynolds numbers for liquid and gas are studied. The hydrodynamic flow regimes found in the experiment are confirmed by the results of numerical simulation. Five different modes are thus considered, namely, channel flooding, smooth film, two-dimensional waves, three-dimensional waves, and film rupture. An analysis of the simulation results shows that the model qualitatively correctly reproduces all the features of film behavior in the studied modes. A satisfactory agreement between calculation and experiment is obtained in terms of the surface shape and film thickness as well as in terms of wavelengths and ridge passing frequencies. It is shown that, on the whole, the calculation well reproduces the onset of the development of instability in a liquid film.

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Funding

This work was supported by the Russian Science Foundation, project no. 19-19-00695.

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Authors and Affiliations

  1. Siberian Federal University, Krasnoyarsk, 660041, Russia

    A. V. Minakov, A. S. Lobasov & A. V. Shebelev

  2. Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    A. V. Minakov, A. S. Lobasov, A. V. Shebelev, D. V. Zaitsev & O. A. Kabov

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  1. A. V. Minakov
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  2. A. S. Lobasov
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  3. A. V. Shebelev
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  4. D. V. Zaitsev
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Correspondence to A. V. Minakov, A. S. Lobasov, A. V. Shebelev, D. V. Zaitsev or O. A. Kabov.

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Translated by V. Potapchouck

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Minakov, A.V., Lobasov, A.S., Shebelev, A.V. et al. Flow Regimes of a Liquid Film Carried Away by a Gas Flow in a Flat Horizontal Channel under Isothermal Conditions. J. Appl. Ind. Math. 16, 490–500 (2022). https://doi.org/10.1134/S1990478922030139

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