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説明:

In this study, the pressure drop and heat transfer in a heat-transfer tube filled with a sintered porous medium comprising Al fibers were investigated using computational fluid dynamics (CFD) simulations. We reconstructed the sintered fibrous porous structure and generated a computational mesh using X-ray computed tomography data, and the simulated pressure drop and heat transfer agreed well with those reported by Enoki et al. [2021]. The differences in both the form coefficient and the permeability between two different samples can be explained from the differences in both the specific solid surface area and the porosity. Further, the CFD simulations indicated that thermal conduction of the Al solid phase enhanced the heat exchange between the air and Al fibers. To examine the effect of solid-phase thermal conduction, we generated a model of a heat-transfer tube having an ideal wire mesh structure, in which we introduced the interfacial thermal conductivity between Al fibers and the inner tube wall as additional factors. We also performed CFD simulations with four different shell-region thicknesses and found that even a very narrow gap of 5 to 10 μm heavily affected the heat-exchange performance because of the low thermal conductivity of the shell region.

権利情報:

• In Copyright
  

キーワード: image-based finite element analysis, computational fluid dynamics, heat transfer device, fibrous porous media

刊行年月日: 2024-05-09

出版者: Elsevier BV

掲載誌:

• Applied Thermal Engineering (ISSN: 13594311) vol. 249 123375

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4526

公開URL: https://doi.org/10.1016/j.applthermaleng.2024.123375

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更新時刻: 2024-06-03 11:55:16 +0900

MDRでの公開時刻: 2026-05-10 08:24:40 +0900