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Influence of Orientation and Radiative Heat Transfer on Aluminum Foams in Buoyancy-Induced Convection

Two differently-produced open-cell aluminum foams were compared to a commercially available finned heat sink. Further, an aluminum plate and block were tested as a reference. All heat sinks have the same base plate dimensions of four by six inches. The first foam was made by investment casting of a...

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Detalles Bibliográficos
Autores principales: Billiet, Marijn, De Schampheleire, Sven, Huisseune, Henk, De Paepe, Michel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455404/
https://www.ncbi.nlm.nih.gov/pubmed/28793601
http://dx.doi.org/10.3390/ma8105340
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author Billiet, Marijn
De Schampheleire, Sven
Huisseune, Henk
De Paepe, Michel
author_facet Billiet, Marijn
De Schampheleire, Sven
Huisseune, Henk
De Paepe, Michel
author_sort Billiet, Marijn
collection PubMed
description Two differently-produced open-cell aluminum foams were compared to a commercially available finned heat sink. Further, an aluminum plate and block were tested as a reference. All heat sinks have the same base plate dimensions of four by six inches. The first foam was made by investment casting of a polyurethane preform and has a porosity of 0.946 and a pore density of 10 pores per linear inch. The second foam is manufactured by casting over a solvable core and has a porosity of 0.85 and a pore density of 2.5 pores per linear inch. The effects of orientation and radiative heat transfer are experimentally investigated. The heat sinks are tested in a vertical and horizontal orientation. The effect of radiative heat transfer is investigated by comparing a painted/anodized heat sink with an untreated one. The heat flux through the heat sink for a certain temperature difference between the environment and the heat sink’s base plate is used as the performance indicator. For temperature differences larger than 30 [Formula: see text] C, the finned heat sink outperforms the in-house-made aluminum foam heat sink on average by 17%. Furthermore, the in-house-made aluminum foam dissipates on average 12% less heat than the other aluminum foam for a temperature difference larger than 40 [Formula: see text] C. By painting/anodizing the heat sinks, the heat transfer rate increased on average by 10% to 50%. Finally, the thermal performance of the horizontal in-house-made aluminum foam heat sink is up to 18% larger than the one of the vertical aluminum foam heat sink.
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spelling pubmed-54554042017-07-28 Influence of Orientation and Radiative Heat Transfer on Aluminum Foams in Buoyancy-Induced Convection Billiet, Marijn De Schampheleire, Sven Huisseune, Henk De Paepe, Michel Materials (Basel) Article Two differently-produced open-cell aluminum foams were compared to a commercially available finned heat sink. Further, an aluminum plate and block were tested as a reference. All heat sinks have the same base plate dimensions of four by six inches. The first foam was made by investment casting of a polyurethane preform and has a porosity of 0.946 and a pore density of 10 pores per linear inch. The second foam is manufactured by casting over a solvable core and has a porosity of 0.85 and a pore density of 2.5 pores per linear inch. The effects of orientation and radiative heat transfer are experimentally investigated. The heat sinks are tested in a vertical and horizontal orientation. The effect of radiative heat transfer is investigated by comparing a painted/anodized heat sink with an untreated one. The heat flux through the heat sink for a certain temperature difference between the environment and the heat sink’s base plate is used as the performance indicator. For temperature differences larger than 30 [Formula: see text] C, the finned heat sink outperforms the in-house-made aluminum foam heat sink on average by 17%. Furthermore, the in-house-made aluminum foam dissipates on average 12% less heat than the other aluminum foam for a temperature difference larger than 40 [Formula: see text] C. By painting/anodizing the heat sinks, the heat transfer rate increased on average by 10% to 50%. Finally, the thermal performance of the horizontal in-house-made aluminum foam heat sink is up to 18% larger than the one of the vertical aluminum foam heat sink. MDPI 2015-10-09 /pmc/articles/PMC5455404/ /pubmed/28793601 http://dx.doi.org/10.3390/ma8105340 Text en © 2015 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Billiet, Marijn
De Schampheleire, Sven
Huisseune, Henk
De Paepe, Michel
Influence of Orientation and Radiative Heat Transfer on Aluminum Foams in Buoyancy-Induced Convection
title Influence of Orientation and Radiative Heat Transfer on Aluminum Foams in Buoyancy-Induced Convection
title_full Influence of Orientation and Radiative Heat Transfer on Aluminum Foams in Buoyancy-Induced Convection
title_fullStr Influence of Orientation and Radiative Heat Transfer on Aluminum Foams in Buoyancy-Induced Convection
title_full_unstemmed Influence of Orientation and Radiative Heat Transfer on Aluminum Foams in Buoyancy-Induced Convection
title_short Influence of Orientation and Radiative Heat Transfer on Aluminum Foams in Buoyancy-Induced Convection
title_sort influence of orientation and radiative heat transfer on aluminum foams in buoyancy-induced convection
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455404/
https://www.ncbi.nlm.nih.gov/pubmed/28793601
http://dx.doi.org/10.3390/ma8105340
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