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Rayleigh–Bénardconvection with animmersed floatingbody : научноеиздание Frick PeterFilimonov SergeiGavrilov Andrei2024 год

Rayleigh–Bénard convection with an immersed floating body : научное издание
статья из журнала

Дополнительные ссылки: eLibrary
База данных: Каталог библиотеки СФУ
Библиографическое описание: Rayleigh–Bénard convection with an immersed floating body : научное издание / P. Frick, S. Filimonov, A. Gavrilov [et al.]. - Текст : непосредственный // Journal of Fluid Mechanics. - 2024. - Т. 979, № . - P. A23. - Russian Science Foundation Номер: 22-61-00098. - ISSN 0022-1120. - ISSN 1469-7645, DOI 10.1017/jfm.2023.1064.
Аннотация: <jats:p>The paper presents the results of an experimental and numerical study of turbulent thermal convection in a rectangular box containing an extended immersed free-floating plate. Varying the values of control parameters, such as Rayleigh number, aspect ratio and vertical position of the plate, provides a wide range of possible modes, from immobile and purely periodic to stochastic. We have shown that stable periodic motions occur when the plate floats close to one of the heat exchangers. An increase in the distance between the plate and the heat exchanger breaks the periodic motion and (at moderate Rayleigh numbers) leads to a pronounced asymmetry, when the plate stays close to one of the walls most of the time, makes rare excursions to the opposite wall and immediately returns. As the Rayleigh number increases, the plate motions from one edge of the box to the other reappear, but always have an irregular character. Regarding the dependence of the system behaviour on the geometry of the box, both lower and upper limits of periodic plate motions were found in the experiments. In the numerical simulations, the upper limit was not achieved – the plate moves quasi-periodically through the chain of vortices of different signs even at the largest aspect ratio being considered. The heat-insulating floating plate provides the spatial and temporal variation of the heat flux and reduces the integral heat flux, but the reduction in heat flux depends significantly on the vertical position of the plate.</jats:p>
Год издания: 2024
Авторы: Frick Peter , Filimonov Sergei , Gavrilov Andrei , Popova Elena , Sukhanovskii Andrei , Vasiliev Andrei
Издательство: Cambridge University Press
Источник: Journal of Fluid Mechanics
Выпуск: Т. 979
Номера страниц: 23
Держатель оригинала документа: Institute of Continuous Media Mechanics, Kutateladze Institute of Thermophysics SB RAS
Количество экземпляров:
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