Radiative heat transfer in a model porous body
Abstract
Radiative energy absorption in a cylindrical channel is examined analytically in terms of directed and diffused fluxes, and the derived expression for a heat source is used to study heat transfer in a porous plate. Consideration is given to an integral for the radiation propagation after emission from the side surface of the channel, and to the probability that radiation will get from one surface element to another. Attention is paid to both large and small fluxes and it is found that the source distribution is a critical parameter in cases of small emissivity. Heat transfer during filler evaporation is with a heat conduction equation for the porous zone and another heat conduction equation, without a source, in the moving evaporation boundary.
 Publication:

Heat Transfer 1982, Volume 2
 Pub Date:
 1982
 Bibcode:
 1982hetr....2..523L
 Keywords:

 Channel Flow;
 Porous Walls;
 Radiative Heat Transfer;
 Thermal Absorption;
 Conductive Heat Transfer;
 Emissivity;
 Evaporation;
 Heat Sources;
 Porous Boundary Layer Control;
 Thermal Diffusion;
 Fluid Mechanics and Heat Transfer