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Natural convection in enclosures with localized heating from below and symmetrical cooling from sides

Orhan Aydin (Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, Michigan, USA)
Wen‐Jei Yang (Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, Michigan, USA)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 1 August 2000

Abstract

Natural convection of air in a two‐dimensional, rectangular enclosure with localized heating from below and symmetrical cooling from the sides has been numerically investigated. Localized heating is simulated by a centrally located heat source on the bottom wall, and four different values of the dimensionless heat source length, 1/5, 2/5, 3/5 and 4/5 are considered. Solutions are obtained for Rayleigh number values from 103 to 106. Local results are presented in the form of streamline and isotherm plots as well as the variation of local Nusselt number on the heated wall. Finally, the average Nusselt number at the heated part of the lower wall, \overline Nu, was shown to increase with an increase the Rayleigh number, Ra, or of the nondimensional heat source thickness, ε.

Keywords

Citation

Aydin, O. and Yang, W. (2000), "Natural convection in enclosures with localized heating from below and symmetrical cooling from sides", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 10 No. 5, pp. 518-529. https://doi.org/10.1108/09615530010338196

Publisher

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MCB UP Ltd

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