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EVOLUTION OF THE HOMOGENIZED VOLUMETRIC RADIATIVE PROPERTIES OF A FAMILY OF α-SiC FOAMS WITH GROWING NOMINAL PORE DIAMETER

Volumen 18, Edición 10, 2015, pp. 1031-1045
DOI: 10.1615/JPorMedia.2015012283
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SINOPSIS

A numerical foam generation method is employed to design open-cell foams with prescribed and realistic textural features (i.e., porosity, volumetric surface, pore size distribution, and pore−pore distance distribution). The foam generation is initialized by seeding the centers of the pores. Seeds are first regularly distributed following a tetrahedral compact network modeling the real cell connectivity observed in samples elaborated with the foam replication method, and their positions are then randomly perturbed. A fast-marching technique coupled to a watershed algorithm governs the growth and the segmentation of the pores. The strut shape is finally controlled by a thickness growth method. Afterward, for a given numerical foam, a numerical tool (iMorph) provides accurate knowledge of the whole set of textural parameters. The homogenized volumetric radiative properties (i.e., extinction, absorption, and scattering coefficients, denoted by β, α, and γ, respectively) of the reconstructed three-dimensional foams can then be identified by the radiative distribution function identification method insofar as they comply with Beerian behavior. In this study, the radiative properties of a set of numerical α-SiC foams with real textural features are compared at T = 300 K. In particular, a practical relationship between the extinction coefficient on the one hand and the nominal pore diameter at fixed porosity on the other hand may be found. Comparisons with previous relationships often used to model heat and mass transfer in high-temperature industrial applications, such as in concentrated solar power plants, are also proposed. Finally, a generator is used to study the influence of the porosity on the extinction coefficient.

CITADO POR
  1. Domingues Gilberto, Monthe Aubin Mekeze, Guévelou Simon, Rousseau Benoit, Study by molecular dynamics of the influence of temperature and pressure on the optical properties of undoped 3C-SiC structures, Journal of Quantitative Spectroscopy and Radiative Transfer, 205, 2018. Crossref

  2. Li Yang, Xia Xin-Lin, Sun Chuang, Wang Jing, Tan He-Ping, Tomography-based radiative transfer analysis of an open-cell foam made of semitransparent alumina ceramics, Solar Energy Materials and Solar Cells, 188, 2018. Crossref

  3. Li Yang, Xia Xin-Lin, Sun Chuang, Zhang Shun-De, Tan He-Ping, Volumetric radiative properties of irregular open-cell foams made from semitransparent absorbing-scattering media, Journal of Quantitative Spectroscopy and Radiative Transfer, 224, 2019. Crossref

  4. Li Yang, Xia Xin-Lin, Sun Chuang, Ai Qing, Tan He-Ping, Radiative characteristics of Voronoi open-cell foams made from semitransparent media, International Journal of Heat and Mass Transfer, 133, 2019. Crossref

  5. Fuqiang Wang, Xinping Zhang, Yan Dong, Hongliang Yi, Shi Xuhang, Yang Li, Ziming Cheng, Progress in radiative transfer in porous medium: A review from macro scale to pore scale with experimental test, Applied Thermal Engineering, 210, 2022. Crossref

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