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Analysis of the exactsolution for theevaporativeconvection problemand properties of thecharacteristicperturbations Bekezhanova V.B.Goncharova O.N.2018 год

Analysis of the exact solution for the evaporative convection problem and properties of the characteristic perturbations : научное издание
статья из журнала

Дополнительные ссылки: РИНЦ
База данных: Каталог библиотеки СФУ
Библиографическое описание: Analysis of the exact solution for the evaporative convection problem and properties of the characteristic perturbations : научное издание / V. B. Bekezhanova, O. N. Goncharova. - Текст : непосредственный // International Journal of Thermal Sciences. - 2018. - Т. 130, № . - P. 323-332. - ISSN 1290-0729. - ISSN 1778-4166, DOI 10.1016/j.ijthermalsci.2018.05.001.
Аннотация: The exact solution for the Boussinesq approximation of the Navier – Stokes equations is analytically constructed to describe the joint flow of an evaporating viscous heat-conducting liquid and gas-vapor mixture in an infinite horizontal channel. The effects of thermodiffusion and diffusive heat conductivity in the gas-vapor phase are additionally taken into account in the governing equations and interface conditions. Possible flow types are classified with respect to the types of the boundary conditions for the vapor concentration on the upper solid wall of the channel. The importance of a solution of special type is that it gives a possibility to specify on the qualitative level the physical factors defining the basic flow mechanisms. The constructed solution has the group nature and allows one to describe the real flow regimes and a formation of patterns observed in the experiments. It describes three classes of flows: pure thermocapillary, mixed and Poiseuille flows according to the dominant force or interaction of effects. The stability of the two-layer flows of the liquid and gas-vapor phase is investigated for the equal values of the longitudinal temperature gradients on the channel walls. In this case the perturbations of the basic flow can lead to the formation of the vortex and thermocapillary structures. The influence of the thermal load intensity and gas flow rate on the type of the arising instability is studied. The evolution of the perturbations is investigated numerically.
Год издания: 2018
Авторы: Bekezhanova V.B. , Goncharova O.N.
Издательство: Elsevier Science Publishing Company, Inc.
Источник: International Journal of Thermal Sciences
Выпуск: Т. 130
Номера страниц: 323-332
Держатель оригинала документа: Altai State University, Institute of Computational Modeling SB RAS, Institute of Thermophysics SB RAS
Количество экземпляров:
Твёрдая копия издания отсутствует в фонде библиотеки

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