CONTINUUM RADIATIVE HEAT TRANSFER MODELING IN MULTI-COMPONENT ANISOTROPIC MEDIA IN THE LIMIT OF GEOMETRICAL OPTICS

Wojciech Lipinski
Research School of Engineering, The Australian National University, Craig Bldg. 35A, 35A Science Road Acton ACT 2501, Canberra, Australia

Sophia Haussener
Laboratory of Renewable Energy Science and Engineering, EPFL, 1015 Lausanne, Switzerland

DOI: 10.1615/TFESC1.prm.013198
pages 2229-2232

KEY WORDS: radiation, participating media, complex media, geometrical optics, modeling

Abstract

Continuum-scale equations of radiative transfer and corresponding boundary conditions are derived for a multi-component anisotropic medium consisting of components in the range of geometrical optics. The derivations are obtained by employing the volume-averaging theory. This study generalizes the previous derivations obtained for multi-component isotropic media. The theory presented is applied to radiatively characterize an example two-component anisotropic medium that finds application in solar energy conversion. Its directional, continuum-scale radiative properties are calculated by incorporating the exact morphology obtained by computed tomography. The continuum-scale properties are compared to those predicted assuming an isotropic medium.