Large-scale turbulence in Rayleigh-B�nard convection

Autor:	P. G. Frik, S. N. Aristov
Rok vydání:	1990
Předmět:	Fluid Flow and Transfer Processes Physics Convection Scale (ratio) Turbulence Mechanical Engineering General Physics and Astronomy K-omega turbulence model Mechanics Physics::Fluid Dynamics Classical mechanics Eddy Turbulence kinetic energy Fluctuation spectrum Rayleigh–Bénard convection
Zdroj:	Fluid Dynamics. 24:690-695
ISSN:	1573-8507 0015-4628
DOI:	10.1007/bf01051720
Popis:	Rayleigh-Benard convection in a plane layer with poorly conducting boundaries is considered. Two-dimensional equations, asymptotically exact for small supercriticalities, are obtained for describing largescale flows whose characteristic dimensions considerably exceed the thickness of the layer. An increase in the dimensions of the layer in plan and higher levels of supercriticality lead to complex turbulent motions of the fluid which are investigated by network methods and by means of an hierarchical model of turbulence. It is shown that the kinetic energy accumulates in the largest eddies, and that the temperature fluctuation spectrum has a maximum at intermediate scales.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::77618da16f4346d52b9cc8b31e55ac18 https://doi.org/10.1007/bf01051720 Zobrazit plný text záznamu Full text from SpringerLink