On the computation of buoyancy-driven turbulent flows in rectangular enclosures

Numerical computations are reported of turbulent natural convection of air in two tall rectangular enclosures with heated and cooled vertical walls. The very different aspect ratios considered, 30:1 and 5:1, lead to appreciable differences in flow structure in the two cases. It is found that a versi...

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Bibliographic Details
Published in:The International journal of heat and fluid flow 1989-01, Vol.19 (2), p.110-117
Main Authors: Ince, N Z, Launder, B E
Format: Article
Language:English
Subjects:
convection
turbulent flow
Online Access:Get full text
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Summary:Numerical computations are reported of turbulent natural convection of air in two tall rectangular enclosures with heated and cooled vertical walls. The very different aspect ratios considered, 30:1 and 5:1, lead to appreciable differences in flow structure in the two cases. It is found that a version of the Jones-Launder low-Reynolds-number k- epsilon model, used previously to compute heat transfer rates downstream of an abrupt expansion, leads to a very satisfactory agreement with reported experimental data of the velocity and thermal field, including the distribution of the Nusselt number.
ISSN:0142-727X