Radiative properties of ordered and disordered porous ceria particle clouds under solar irradiation

Abstract

We study the radiative behavior of particle clouds consisting of two types of highly porous spherical ceria particles under direct solar irradiation—one with a templated three-dimensionally ordered macroporous (3DOM) structure and the other with pores randomly located within the structure. Individual radiative properties—the scattering efficiency factor, absorption efficiency factor, and the scattering phase function—of the randomly porous particles are numerically predicted in this work for comparison against existing 3DOM data. Clouds of monodisperse particles with a spatially uniform particle density are studied for each case. Solutions are compared to results based on individual particle scattering properties obtained from an effective medium theory combined with Mie theory results. It is found that the high degree of order in 3DOM particles does not significantly change the radiative properties of the cloud. However *something interesting*.