Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers
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Knowledge AreaMecánica de Fluidos
SponsorsThis research has been supported by the Dirección General de Investigación of ministerio de Educacaión y Ciencia of Spanish Goverment, Through DPI 2003-02719 Project.
Bibliographic CitationKAISER, A.S., ZAMORA, B., VIEDMA, A. Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers. Computers and Fluids [ en línea ].vol. 38, nº1. 5 de Febrero 2008. [ fecha de consulta: 15 de Diciembre de 2008.] Disponible en: http://www.sciencedirect.com. DOI 10.1016/j.compfluid.2007.07.024
KeywordsCorrientes de convección turbulenta
Canal inclinado convergente
Turbulent convective flows
Inclined converging channels
A numerical study of natural convective flows, mainly for high Rayleigh numbers, in a sloped converging channel, for different inclination and convergence angles has been carried out, taking into account the lacks of the literature on some aspect of this configuration. Two dimensional, laminar, transitional and turbulent simulations were obtained by solving the fully-elliptic governing equations using two different general purpose codes: Fluent and Phoenics. The low-Reynolds K-w turbulence model has been employed. Special amphasis is made on the systematic comparisons of computational results with experimental and numerical data taken from literature for turbulent regime, so as on the transitional conditions, studying the influence of Rayleigh number and channel aspect ratio. A generalized turbulent correlation for the average Nusselt number has been obtained from numerical results in a channel with isithermal hated plates, for symmetric heating conditions. This correlation is valid for ...
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