Use of a radiation diffusion model for determination of optical and thermal radiative properties of anisotropie silica fiber thermal insulation

Autor:	S. V. Stepanov, S. S. Moiseev, Petrov Vadim A
Rok vydání:	1996
Předmět:	Optics Materials science Silica fiber Thermal insulation business.industry Attenuation coefficient Glass fiber Radiative transfer Diffusion (business) Molar absorptivity Condensed Matter Physics business Radiation properties
Zdroj:	International Journal of Thermophysics. 17:515-525
ISSN:	1572-9567 0195-928X
DOI:	10.1007/bf01443408
Popis:	A radiation diffusion model is used to describe radiation transfer in highly scattering anisotropic semitransparent materials. The transmissivities of the sample disks of silica glass fiber thermal insulation of different thicknesses and orientations were measured. The samples were cut from the same insulation slab. The axis of material structure symmetry was parallel to the axis of samples in one case and perpendicular to it in the other case. The effective absorption coefficient and radiation diffusion coefficient were obtained for three wavelengths of a probing He-Ne laser, namely, 0.63, 1.15, and 3.39 µm. The spectral hemispherical absorptivity and biliemisperical reflectivity as a function of the thickness of the plane layer are calculated and presented.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9d9291a96660ee138a97c0b1b693dfaf https://doi.org/10.1007/bf01443408 Zobrazit plný text záznamu Full text from SpringerLink