Free Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres

Free convective heat transfer in the closed gap between concentric semi-hemispheres is quantified by means of a numerical approach based on the volume control method using the SIMPLE algorithm. The average Nusselt number is determined for several configurations obtained by varying the cavity’s aspec...

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Autores principales:	Abderrahmane Baïri, Nacim Alilat, Alexander Martín-Garín, Kemi Adeyeye, José-Antonio Millán-García, Luis Roseiro
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	natural convection electronic packaging numerical approach concentric semi-hemispheres buildings architecture Technology T
Acceso en línea:	https://doaj.org/article/c81a22902096400b95b872995c0298d5
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id	oai:doaj.org-article:c81a22902096400b95b872995c0298d5
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spelling	oai:doaj.org-article:c81a22902096400b95b872995c0298d52021-11-25T17:25:54ZFree Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres10.3390/en142274791996-1073https://doaj.org/article/c81a22902096400b95b872995c0298d52021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7479https://doaj.org/toc/1996-1073Free convective heat transfer in the closed gap between concentric semi-hemispheres is quantified by means of a numerical approach based on the volume control method using the SIMPLE algorithm. The average Nusselt number is determined for several configurations obtained by varying the cavity’s aspect ratio between 0.15 and 1.5, while the Rayleigh number varies within the 5.33 × 10<sup>3</sup>–4.50 × 10<sup>8</sup> range. The results show that the correlations available in the literature dealing with concentric whole spheres cannot be used for the configuration treated here. The new correlation between the Nusselt and Rayleigh numbers proposed in this work can be applied in various engineering sectors, such as in the electronic packaging considered in this present work, buildings, and architecture.Abderrahmane BaïriNacim AlilatAlexander Martín-GarínKemi AdeyeyeJosé-Antonio Millán-GarcíaLuis RoseiroMDPI AGarticlenatural convectionelectronic packagingnumerical approachconcentric semi-hemispheresbuildingsarchitectureTechnologyTENEnergies, Vol 14, Iss 7479, p 7479 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	natural convection electronic packaging numerical approach concentric semi-hemispheres buildings architecture Technology T
spellingShingle	natural convection electronic packaging numerical approach concentric semi-hemispheres buildings architecture Technology T Abderrahmane Baïri Nacim Alilat Alexander Martín-Garín Kemi Adeyeye José-Antonio Millán-García Luis Roseiro Free Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres
description	Free convective heat transfer in the closed gap between concentric semi-hemispheres is quantified by means of a numerical approach based on the volume control method using the SIMPLE algorithm. The average Nusselt number is determined for several configurations obtained by varying the cavity’s aspect ratio between 0.15 and 1.5, while the Rayleigh number varies within the 5.33 × 10<sup>3</sup>–4.50 × 10<sup>8</sup> range. The results show that the correlations available in the literature dealing with concentric whole spheres cannot be used for the configuration treated here. The new correlation between the Nusselt and Rayleigh numbers proposed in this work can be applied in various engineering sectors, such as in the electronic packaging considered in this present work, buildings, and architecture.
format	article
author	Abderrahmane Baïri Nacim Alilat Alexander Martín-Garín Kemi Adeyeye José-Antonio Millán-García Luis Roseiro
author_facet	Abderrahmane Baïri Nacim Alilat Alexander Martín-Garín Kemi Adeyeye José-Antonio Millán-García Luis Roseiro
author_sort	Abderrahmane Baïri
title	Free Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres
title_short	Free Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres
title_full	Free Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres
title_fullStr	Free Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres
title_full_unstemmed	Free Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres
title_sort	free convective heat transfer in a closed gap between concentric semi-hemispheres
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c81a22902096400b95b872995c0298d5
work_keys_str_mv	AT abderrahmanebairi freeconvectiveheattransferinaclosedgapbetweenconcentricsemihemispheres AT nacimalilat freeconvectiveheattransferinaclosedgapbetweenconcentricsemihemispheres AT alexandermartingarin freeconvectiveheattransferinaclosedgapbetweenconcentricsemihemispheres AT kemiadeyeye freeconvectiveheattransferinaclosedgapbetweenconcentricsemihemispheres AT joseantoniomillangarcia freeconvectiveheattransferinaclosedgapbetweenconcentricsemihemispheres AT luisroseiro freeconvectiveheattransferinaclosedgapbetweenconcentricsemihemispheres
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Free Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres

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