Method of obtaining dual-phase-lag times in aggregate porous materials with a nonhomogeneous inner structure
When working with porous non-Fourier heat conduction materials under the dual-phase-lag model, it becomes necessary to find out the values of the relaxation (Tq) and thermalization (TT) times. In this article, we propose an experimental method to obtain these lagging times for aggregated carbon nano...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:10256/27282 |
| Acceso en línea: | http://hdl.handle.net/10256/27282 |
| Access Level: | acceso abierto |
| Palabra clave: | Materials porosos -- Propietats tèrmiques Porous materials -- Thermal properties |
| Sumario: | When working with porous non-Fourier heat conduction materials under the dual-phase-lag model, it becomes necessary to find out the values of the relaxation (Tq) and thermalization (TT) times. In this article, we propose an experimental method to obtain these lagging times for aggregated carbon nanotubes (CNTs). The method, which can be used for any other material, consists of applying a transient heat pulse at one side of the specimen while registering the temperature–time curves at multiple points along it. The remaining faces of the specimen are thermally isolated. Then, an analytical model incorporating these boundary conditions is executed iteratively, varying the lagging times, to minimize the difference between the experimental and theoretical curves. Finally, the best fitting curve gives the best combination of and values. We also present the evolution of the lagging values along the specimen’s thickness in a CNT aggregate |
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