Simultaneous Radiation, Conduction, and Convection in a Spectrally Selective, Emitting, and Scattering Porous Bed

[+] Author and Article Information
A. T. Leung, D. K. Edwards

University of California, Los Angeles, Calif.

J. Heat Transfer 88(2), 231-238 (May 01, 1966) (8 pages) doi:10.1115/1.3691520 History: Received July 30, 1965


An exact formulation of simultaneous radiation, conduction, and convection heat transfer for steady-state conditions in a one-dimensional, semi-infinite, isotropic, homogeneous, absorbing, and scattering porous bed is presented. Both diffuse and collimated radiant fluxes are incident on the bed causing absorption, scattering, emission, and heating of the bed which in turn heats a transparent, constant-property fluid flowing normal to the surface. Spectral selectivity is allowed for when the source energy is of shorter wavelength than the emitted energy. Exact and approximate numerical solutions and a linearized closed-form solution are given for inflow, as in a solar heat collector, and outflow, as with a heat shield.

Copyright © 1966 by ASME
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