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International Heat Transfer Conference 9

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

NUMERICAL STUDY OF THE HORIZONTAL WALLS HEAT CONDUCTION EFFECTS IN THE RAYLEIGH-BENARD CONVECTION

Ph. Carriere
Ecole Centrale de Lyon, 69131 Ecully Cedex, France

A.C.R Brasil Junior
University of Brasilia, 70910 Brasilia, Brazil

Denis Jeandel
Laboratoire de Mécanique des Fluides et d'Acoustique, CNRS UMR 5509 Ecole Centrale de Lyon/Université C. Bernard-Lyon I/INSA de Lyon ECL, 36 avenue Guy de Collongue, 69134 Ecully Cedex

Abstract

In this paper the effects of the conduction heat transfer in the upper and lower walls limiting a Rayleigh-Benard fluid layer are analysed.
The conduction-convection coupled problem is analysed, on one hand by a linear stability theory in order to determine the convective threshold, and on the other hand by the 3D finite elements calculation to study the flow pattern for supercritical convection.
A 3D flow pattern is observed near the onset of convection.

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