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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

IDENTIFICATION OF THERMAL RADIATION PROPERTIES OF DISPERSED MEDIA: COMPARISON OF DIFFERENT STRATEGIES

Get access (open in a dialog) DOI: 10.1615/IHTC11.4460
pages 409-414

Abstract

This paper is focused on identification methodology for thermal radiation properties of dispersed media. A study of the condition number, as a function of the optical thickness, will allow us to determine the capability of four different strategies to identify the radiative parameters. The success of identification method depends on the chosen physical model, on the experimental data set (number of measurement points and angular direction choice) and on the detector noise level. The four strategies analysed consider: the incident beam shape, collimated (normal or oblique) or diffuse, the configuration of the detection system (directional or hemispherical) and the self emission can be taken into account or not. The phase function considered is a modified Henyey-Greenstein corresponding to fiber insulation. Numerical simulations will allow to compare results obtained with the different strategies, from calculated bidirectional transmittance/reflectance, directional emittance and hemispherical transmittance/reflectance.