Radiative behavior of low-porosity ceramics: II–Experimental and numerical study of porous alumina up to high temperatures - Archive ouverte HAL Access content directly
Journal Articles Journal of Quantitative Spectroscopy and Radiative Transfer Year : 2021

Radiative behavior of low-porosity ceramics: II–Experimental and numerical study of porous alumina up to high temperatures

Abstract

We compare two methods of characterizing the radiative behavior of 22% porous sintered alumina disks containing μm-sized pores on the 1μm to 7μm wavelength range up to very high temperatures. The first consists of direct spectroscopic measurements of the normal-hemispherical reflectance and transmittance at room temperature, as well as the normal emittance up to 1300°C. The second is a two-step multi-scale numerical approach: the volume radiative properties and surface reflectivity are first determined from physical optics computations on tomography-reconstructed microstructures, then applied to the resolution of the radiative transfer equation on an equivalent homogeneous medium to obtain the spectral reflectance, transmittance, and emittance. Uncertainties in the numerical results, mainly due to microstructural variability, are quantified through sensitivity studies. The good agreement between the experimental and numerical results confirm the ability of our proposed numerical approach to give accurate predictions of the high-temperature radiative behavior of porous ceramics.
Fichier principal
Vignette du fichier
Low2022.pdf (683.62 Ko) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-03660045 , version 1 (16-05-2023)

Licence

Identifiers

Cite

Zi Kang Low, Alexey Novikov, Domingos de Sousa Meneses, Dominique Baillis. Radiative behavior of low-porosity ceramics: II–Experimental and numerical study of porous alumina up to high temperatures. Journal of Quantitative Spectroscopy and Radiative Transfer, 2021, 272, pp.107821. ⟨10.1016/j.jqsrt.2021.107821⟩. ⟨hal-03660045⟩
34 View
21 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More