Determination of Radiation Properties of Porous Media by Measuring Emission

抄録

This paper proposes a method to measure the radiative properties of porous media in which radiative emission, absorption and scattering are occurring. The method is based on measuring radiation intensity out of the porous medium and then estimating properties which agree with the magnitude of emission. The principles of the method and demonstrated with a numerical analysis of the radiative transfer equation. This method is excellent for measurements of albedo, and supplements the conventional methods based on transmission measurements, which give useful information on extinction but not on albedo. Experimental results have offered reasonable values for each property, i. e., extinction coefficient, albedo and back- scattering fraction factor. Among these, albedo is well estimated with this method.