Radiation heat transfer in anisotropically scattering media
Abstract
Radiation heat transfer in anisotropically scattering media is considered. Scaling laws are formulated to predict the radiant heat flux in anisotropically scattering, onedimensional planar media. The accuracy in scaling the radiative heat flux in isothermal, homogeneous media is shown to be excellent. The radiant scaling laws are applied to combined mode heat transfer problems which require the solution of the energy equation for the temperature profile. The average incident radiation which represents the radiation contribution to the energy equation, is accurately scaled by the multilayer solution technique. The heat flux and the temperature distributions are predicted accurately. A single scattering experiment is developed to study anisotropically scattering media in the infrared. The stationary detection system measures the angular scattered energy at selected wavelengths. Direct comparison of the experimental phase function data with Mie theory calculations is presented for a test medium of sodalime glass beads with a known size distribution and published refractive indices. The computations predict scatterin phase functions and asymmetry factors based upon Mie theory for any size distribution and optical properties. The good agreement in the phase functions and the asymmetry factors validate the experimental setup.
 Publication:

Ph.D. Thesis
 Pub Date:
 1985
 Bibcode:
 1985PhDT........35L
 Keywords:

 Anisotropic Media;
 Heat Flux;
 Radiant Flux Density;
 Radiant Heating;
 Radiative Heat Transfer;
 Scattering Functions;
 Finite Difference Theory;
 Mie Scattering;
 Nusselt Number;
 Particle Size Distribution;
 Fluid Mechanics and Heat Transfer