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Mixed convection heat transfer in ventilated cavities with opposing and assisting flows

A. Raji (Laboratoire d’Energétique, Département de Physique Appliquée, Faculté des Sciences et Techniques, Béni Mellal, Morocco, and)
M. Hasnaoui (Laboratoire de Mécanique des Fluides et Energétique, Département de Physique, Faculté des Sciences Semlalia, Marrakesh, Morocco)

Engineering Computations

ISSN: 0264-4401

Article publication date: 1 August 2000

Abstract

Mixed convection heat transfer in ventilated cavities submitted to a constant heat flux has been numerically studied using the Navier‐Stokes equations with the Boussinesq approximation. Results in terms of streamlines and isotherms are produced for different values of the governing parameters, namely, the Rayleigh number (103q Raq 106) and the Reynolds number (5 ≤q Req 5, 000). The geometrical parameters are the aspect ratio of the cavity A = L/H = 2 and the relative height of the openings B = h/H = 1/4. Results of the simulations show that the maximum interaction between natural and forced convection occurs for couples (Ra, Re) which can be correlated as Re = a Rab.

Keywords

Citation

Raji, A. and Hasnaoui, M. (2000), "Mixed convection heat transfer in ventilated cavities with opposing and assisting flows", Engineering Computations, Vol. 17 No. 5, pp. 556-572. https://doi.org/10.1108/02644400010339770

Publisher

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MCB UP Ltd

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