Abstract:
A computational model of boiling of a subcooled liquid in the wall granular layer has been developed on the basis of new experimental data on initiation and evolution of convective flows during nonstationary heating of the wall. The influence of the thermophysical properties of the batch elements on the temperature distribution in the wall region has been studied. The characteristic features of initiation of microconvection in a model cell have been revealed, and the impact of microconvection on the conditions of vapor bubble nucleation depending on the initial subcooling and the extent of the delivered heat flux has been established. New experimental data on limiting heat fluxes that cause microconvection have been obtained with the help of a gradient heat flux sensor for different combinations of the properties of the liquid and the particles of the granular layer model.
This work was supported by the Russian Scientific Foundation, project no. 15-19-00177, concerning the experimental and numerical modeling of the temperature fields, and in part by the Russian Foundation for Basic Research, project no. 14-08-00626, concerning the investigations of the convection mechanism.
Citation:
B. G. Pokusaev, S. P. Karlov, D. A. Nekrasov, N. S. Zakharov, “Initiation of convection flows in the wall granular layer in the problem of boiling of subcooled coolant”, TVT, 54:5 (2016), 753–760; High Temperature, 54:5 (2016), 708–715
\Bibitem{PokKarNek16}
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\paper Initiation of convection flows in the wall granular layer in the problem of boiling of subcooled coolant
\jour TVT
\yr 2016
\vol 54
\issue 5
\pages 753--760
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\crossref{https://doi.org/10.7868/S0040364416040190}
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\transl
\jour High Temperature
\yr 2016
\vol 54
\issue 5
\pages 708--715
\crossref{https://doi.org/10.1134/S0018151X16040180}
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Linking options:
https://www.mathnet.ru/eng/tvt9326
https://www.mathnet.ru/eng/tvt/v54/i5/p753
This publication is cited in the following 4 articles:
A. N. Pavlenko, TVT, 61:6 (2023), 807–824
A. N. Pavlenko, “Boiling in High Temperature Publications: from Basic Mechanisms to Development of Flow Control Methods for Enhancement of Heat Transfer”, High Temp, 61:6 (2023), 742
M. M. Ramazanov, D. A. Alkhasova, “Mathematical model of heat and mass transfer in a geothermal reservoir on extraction of steam and water mixture”, High Temperature, 55:2 (2017), 273–279
B. Pokusaev, A. Vyazmin, N. Zakharov, S. Karlov, D. Nekrasov, V. Reznik, D. Khramtsov, “Non-stationary heat transfer in gels applied to biotechnology”, Therm. Sci., 21:5 (2017), 2237–2246