NDLI: Material Parameters Influencing the Radiative Properties of Heterogeneous Optically Thick Oxide Ceramics

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Rousseau, Benoit Gomart, Hector Meneses, Domingos De Sousa Echegut, Patrick
Copyright Year	2009
Abstract	In this work is described a hybrid numerical code aiming to retrieve the thermal radiative properties of opaque heterogeneous coatings. The code is based on the combination of a Monte Carlo Ray Tracing (MCRT) program and of the use of the Effective Medium Approximation (EMA). This hybrid code is able to takes account for the surface roughness, the internal porosity and the chemical composition of a given layer. The solid part of a coating is composed of a conducting oxide which contents excess oxygen (δ ∼ 0.1–0.2). Due to δ and to their thicknesses (> 2 μm), the coatings are opaque for the spectral range going from the far infrared range to the visible range. For each layers, their normal spectral emissivity have been measured by infrared spectrometry (T ∼1000K). The comparison of the numerical spectra to the experimental ones permits the discussion of the effects of both the surface roughness, and the internal porosity on the emissivity spectra.
Sponsorship	Heat Transfer Division
Starting Page	403
Ending Page	410
Page Count	8
File Format	PDF
ISBN	9780791843567
DOI	10.1115/HT2009-88574
e-ISBN	9780791838518
Volume Number	Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Heat Transfer Equipment; Heat Transfer in Electronic Equipment
Conference Proceedings	ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
Language	English
Publisher Date	2009-07-19
Publisher Place	San Francisco, California, USA
Access Restriction	Subscribed
Subject Keyword	Infrared spectroscopy Emissivity Oxygen Approximation Spectra (spectroscopy) Ray tracing Surface roughness Porosity Coatings Oxide ceramics
Content Type	Text
Resource Type	Article

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