Multi-dimensional discrete ordinates solutions to combined mode radiation heat transfer problems and their application to a free-falling particle, direct absorption solar receiver

Details Multi-dimensional discrete ordinates solutions to combined mode radiation heat transfer problems and their application to a free-falling particle, direct absorption solar receiver Multi-dimensional discrete ordinates solutions to combined mode radiation heat transfer problems and their application to a free-falling particle, direct absorption solar receiver

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phdt.........1r&link_type=abstract

Ph.D. Thesis - New Mexico State Univ. Sandia National Labs., Albuquerque, NM. Solar Thermal Test Facility.

Mathematics

Absorptivity, Distribution Functions, Energy Conservation, Heat Flux, Mathematical Models, Radiative Heat Transfer, Thermodynamics, Adsorption, Algorithms, Particle Precipitation, Rayleigh Scattering, Solar Collectors, Solar Radiation

Scientific paper

Multi-dimensional radiative transfer in combined mode heat transfer problems was investigated with emphasis on the analysis and characterization of a free-falling particle cloud, direct absorption solar central receiver. A model was developed to calculate the relevant distributions in the curtain while a concentrated solar beam is impinging on the front face of the medium. The discrete ordinated approximation was applied to allow the spectral equation of transfer (EOT) to be modeled as a PDE. Model verification tests were conducted to determine the accuracy of the model. One- and two-dimensional results showed that the discrete ordinates model provides satisfactory estimates of the radiant intensity, the heat flux and the temperature distributions for ordinate sets above S4 (12-flux approximation) for both the black and gray cases.

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