Abstract
We present a new method to compute the radiative characteristics of spherical particles beds. This method is applied to beds made of opaque diffusely or specularly reflecting particles with size parameters ranging in the geometric optics limit. It is based on a Monte Carlo procedure, and no hypotheses are made on dependent or independent scattering regime. Thus, the limits of validity of independent scattering hypothesis are investigated. Firstly, we present the principle and the hypothesis of the method. It is then applied to different beds and permits us to analyze the evolution of the extinction coefficient, scattering albedo, and phase function of the bed with the porosity and with the reflecting properties of the particles
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