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International Heat Transfer Conference 12

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

Natural convection in rectangular enclosures heated from below and symmetrically cooled from the top and both sides

Massimo Corcione
Dipartimento di Fisica Tecnica, Universita di Roma "La Sapienza", via Eudossiana, 18 - 00184- Rome, Italy

Lucia Fontana
Dipartimento di Architettura Università degli Studi Roma Tre via Madonna dei Monti, 40 00184 Roma

DOI: 10.1615/IHTC12.1850
6 pages

要約

A numerical analysis of steady natural convection in air-filled, 2-D rectangular enclosures heated from below and symmetrically cooled from the top and both sides is conducted. The temperature and velocity fields are solved for steady laminar flow under the assumption of isothermal boundary walls. A specifically developed numerical model based on the SIMPLE algorithm is used for the solution of the mass, momentum and energy transfer governing equations. Simulations are performed for several values of both the aspect ratio and the Rayleigh number of the enclosure, whose influence upon the flow structure type and the heat transfer rate are analyzed and discussed. In addition, the heat transfer rate results obtained are expressed through a dimensionless correlation.

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