LAMINAR NATURAL CONVECTIVE HEAT TRANSFER IN PARABOLIC ENCLOSURES

A finite volume analysis of laminar natural convection of air within full parabolic enclosures heated from below is reported for the enclosure aspect ratio 0.27 £ AR £ 0.7 and a range of the Rayleigh number 5.5 x 106 £ Ra £ 9.8 x 107. The shape of the enclosures strongly affects the results obtained...

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Autor principal:	Ola Kamiyo
Formato:	article
Lenguaje:	EN
Publicado:	Faculty of Engineering, University of Kufa 2021
Materias:	parabolic enclosure natural convection heat transfer pitch roof pitch angle. Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/c2cae83cb68f495c926c1318d618e7fc
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id	oai:doaj.org-article:c2cae83cb68f495c926c1318d618e7fc
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spelling	oai:doaj.org-article:c2cae83cb68f495c926c1318d618e7fc2021-11-15T11:37:20ZLAMINAR NATURAL CONVECTIVE HEAT TRANSFER IN PARABOLIC ENCLOSURES10.30572/2018/kje/1204062071-55282523-0018https://doaj.org/article/c2cae83cb68f495c926c1318d618e7fc2021-10-01T00:00:00Zhttps://journal.uokufa.edu.iq/index.php/kje/article/view/1796https://doaj.org/toc/2071-5528https://doaj.org/toc/2523-0018A finite volume analysis of laminar natural convection of air within full parabolic enclosures heated from below is reported for the enclosure aspect ratio 0.27 £ AR £ 0.7 and a range of the Rayleigh number 5.5 x 106 £ Ra £ 9.8 x 107. The shape of the enclosures strongly affects the results obtained. Quasi-symmetrically arranged counter-rotating vortices are formed in each of the enclosures. The shape of the cells are influenced by the bounding curved and flat surfaces as they change from being rectangular at the periphery to circular at the core. There are reduction in the size and intensity of the on the cells from the center to the bottom corners. At steady state, there exists in each enclosure a central thermal plume that thickens as the roof pitch angle increases. The heat transfer pattern matches the flow of the plumes and jets from the walls. For the 15o roof pitch enclosure, the heat transfer rate increases sharply at a critical Ra value of 5 x 106.Ola KamiyoFaculty of Engineering, University of Kufaarticleparabolic enclosurenatural convectionheat transferpitch roofpitch angle.Engineering (General). Civil engineering (General)TA1-2040ENMağallaẗ Al-kūfaẗ Al-handasiyyaẗ, Vol 12, Iss 4, Pp 78-93 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	parabolic enclosure natural convection heat transfer pitch roof pitch angle. Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	parabolic enclosure natural convection heat transfer pitch roof pitch angle. Engineering (General). Civil engineering (General) TA1-2040 Ola Kamiyo LAMINAR NATURAL CONVECTIVE HEAT TRANSFER IN PARABOLIC ENCLOSURES
description	A finite volume analysis of laminar natural convection of air within full parabolic enclosures heated from below is reported for the enclosure aspect ratio 0.27 £ AR £ 0.7 and a range of the Rayleigh number 5.5 x 106 £ Ra £ 9.8 x 107. The shape of the enclosures strongly affects the results obtained. Quasi-symmetrically arranged counter-rotating vortices are formed in each of the enclosures. The shape of the cells are influenced by the bounding curved and flat surfaces as they change from being rectangular at the periphery to circular at the core. There are reduction in the size and intensity of the on the cells from the center to the bottom corners. At steady state, there exists in each enclosure a central thermal plume that thickens as the roof pitch angle increases. The heat transfer pattern matches the flow of the plumes and jets from the walls. For the 15o roof pitch enclosure, the heat transfer rate increases sharply at a critical Ra value of 5 x 106.
format	article
author	Ola Kamiyo
author_facet	Ola Kamiyo
author_sort	Ola Kamiyo
title	LAMINAR NATURAL CONVECTIVE HEAT TRANSFER IN PARABOLIC ENCLOSURES
title_short	LAMINAR NATURAL CONVECTIVE HEAT TRANSFER IN PARABOLIC ENCLOSURES
title_full	LAMINAR NATURAL CONVECTIVE HEAT TRANSFER IN PARABOLIC ENCLOSURES
title_fullStr	LAMINAR NATURAL CONVECTIVE HEAT TRANSFER IN PARABOLIC ENCLOSURES
title_full_unstemmed	LAMINAR NATURAL CONVECTIVE HEAT TRANSFER IN PARABOLIC ENCLOSURES
title_sort	laminar natural convective heat transfer in parabolic enclosures
publisher	Faculty of Engineering, University of Kufa
publishDate	2021
url	https://doaj.org/article/c2cae83cb68f495c926c1318d618e7fc
work_keys_str_mv	AT olakamiyo laminarnaturalconvectiveheattransferinparabolicenclosures
_version_	1718428458287104000

LAMINAR NATURAL CONVECTIVE HEAT TRANSFER IN PARABOLIC ENCLOSURES

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