Flow and Convection in Metal Foams: A Survey and New CFD Results
Metal foams are widely studied as possible tools for the enhancement of heat transfer from hot bodies. The basic idea is that a metal foam tends to significantly increase the heat exchange area between the hot solid body and the external cooling fluid. For this reason, this class of porous materials...
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| Format: | Article |
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MDPI AG
2020-09-01
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| Series: | Fluids |
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| Online Access: | https://www.mdpi.com/2311-5521/5/3/155 |
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| author | Beatrice Pulvirenti Michele Celli Antonio Barletta |
| author_facet | Beatrice Pulvirenti Michele Celli Antonio Barletta |
| author_sort | Beatrice Pulvirenti |
| collection | DOAJ |
| description | Metal foams are widely studied as possible tools for the enhancement of heat transfer from hot bodies. The basic idea is that a metal foam tends to significantly increase the heat exchange area between the hot solid body and the external cooling fluid. For this reason, this class of porous materials is considered as a good candidate for an alternative to finned surfaces, with different pros and cons. Among the pros, we mention the generally wider area of contact per unit volume between solid and fluid. Among the cons is the difficulty to produce different specimens with the same inner structure, with the consequence that their performance may be significantly variable. This paper will offer a survey of the literature with a focus on the main heat transfer characteristics of the metal foams and the energy balance model based on Local Thermal Non-Equilibrium (LTNE). Then, a numerical simulation of the heat transfer at the pore-scale level for an artificial foam with a spatially periodic structure will be discussed. Finally, these numerical results will be employed to assess the macroscopic modeling of the flow and heat transfer in a metal foam. More precisely, the Darcy–Forchheimer model and the LTNE model adopted to describe the momentum and energy transfer in metal foams have been validated for metallic periodic structures. |
| first_indexed | 2024-03-10T16:32:06Z |
| format | Article |
| id | doaj.art-a6e33f9b2d744d75b5cc743f1473e26d |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-10T16:32:06Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-a6e33f9b2d744d75b5cc743f1473e26d2023-11-20T12:45:42ZengMDPI AGFluids2311-55212020-09-015315510.3390/fluids5030155Flow and Convection in Metal Foams: A Survey and New CFD ResultsBeatrice Pulvirenti0Michele Celli1Antonio Barletta2Department of Industrial Engineering, Alma Mater Studiorum Università di Bologna, Viale Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering, Alma Mater Studiorum Università di Bologna, Viale Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering, Alma Mater Studiorum Università di Bologna, Viale Risorgimento 2, 40136 Bologna, ItalyMetal foams are widely studied as possible tools for the enhancement of heat transfer from hot bodies. The basic idea is that a metal foam tends to significantly increase the heat exchange area between the hot solid body and the external cooling fluid. For this reason, this class of porous materials is considered as a good candidate for an alternative to finned surfaces, with different pros and cons. Among the pros, we mention the generally wider area of contact per unit volume between solid and fluid. Among the cons is the difficulty to produce different specimens with the same inner structure, with the consequence that their performance may be significantly variable. This paper will offer a survey of the literature with a focus on the main heat transfer characteristics of the metal foams and the energy balance model based on Local Thermal Non-Equilibrium (LTNE). Then, a numerical simulation of the heat transfer at the pore-scale level for an artificial foam with a spatially periodic structure will be discussed. Finally, these numerical results will be employed to assess the macroscopic modeling of the flow and heat transfer in a metal foam. More precisely, the Darcy–Forchheimer model and the LTNE model adopted to describe the momentum and energy transfer in metal foams have been validated for metallic periodic structures.https://www.mdpi.com/2311-5521/5/3/155metal foamporous mediumconvectionlocal thermal non-equilibrium |
| spellingShingle | Beatrice Pulvirenti Michele Celli Antonio Barletta Flow and Convection in Metal Foams: A Survey and New CFD Results Fluids metal foam porous medium convection local thermal non-equilibrium |
| title | Flow and Convection in Metal Foams: A Survey and New CFD Results |
| title_full | Flow and Convection in Metal Foams: A Survey and New CFD Results |
| title_fullStr | Flow and Convection in Metal Foams: A Survey and New CFD Results |
| title_full_unstemmed | Flow and Convection in Metal Foams: A Survey and New CFD Results |
| title_short | Flow and Convection in Metal Foams: A Survey and New CFD Results |
| title_sort | flow and convection in metal foams a survey and new cfd results |
| topic | metal foam porous medium convection local thermal non-equilibrium |
| url | https://www.mdpi.com/2311-5521/5/3/155 |
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