Laminar and turbulent natural convection in rectangular cavities

Kelson, Neil A., Reizes, John, Behnia, Masud, Leonardi, Eddy, & de Vahl Davis, Graham (1992) Laminar and turbulent natural convection in rectangular cavities. In Reizes, John (Ed.) Transport Phenomena in Heat and Mass Transfer: Proceedings of the Fourth International Symposium on Transport Phenomena in Heat and Mass Transfer (ISTP-IV), Elsevier, Sydney, N.S.W, pp. 74-86.

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Abstract

"This chapter discusses laminar and turbulent natural convection in rectangular cavities. Natural convection in rectangular two-dimensional cavities has become a standard problem in numerical heat transfer because of its relevance in understanding a number of problems in engineering. Current research identified a number of difficulties with regard to the numerical methods and the turbulence modeling for this class of flows. Obtaining numerical predictions at high Rayleigh numbers proved computationally expensive such that results beyond Ra ∼ 1014 are rarely reported. The chapter discusses a study in which it was found that turbulent computations in square cavities can't be extended beyond Ra ∼ O (1012) despite having developed a code that proved very efficient for the high Ra laminar regime. As the Rayleigh number increased, thin boundary layers began to form next to the vertical walls, and the central region became progressively more stagnant and highly stratified. Results obtained for the high Ra laminar regime were in good agreement with existing studies. Turbulence computations, although of a preliminary nature, indicated that a second moment closure model was capable of predicting the experimentally observed flow features."--Publisher Summary

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ID Code: 93229
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
DOI: 10.1016/B978-0-444-89851-7.50012-1
ISBN: 9780444898517
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Computational Fluid Dynamics (091501)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Computational Heat Transfer (091502)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Turbulent Flows (091508)
Divisions: Current > QUT Faculties and Divisions > Division of Technology, Information and Learning Support
Current > Research Centres > High Performance Computing and Research Support
Copyright Owner: Copyright 1992 Elsevier
Deposited On: 25 Feb 2016 02:47
Last Modified: 25 Feb 2016 03:11

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