An unsteady conduction and two-phase radiation in a 2-D rectangular enclosure with gas and particles

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A problem of combined conductive and two-phase radiative heat transfer in a two-dimensional rectangular enclosure with two-phase (gas-particles) media is analyzed. A two-phase radiative transfer equation (RTE) considering radiation by both gas and particles is studied. Its nonlinear integrodifferential RTE is solved using the discrete ordinates method (DOM, or so-called S-N, method). To validate the program, we compare the solution in a two-dimensional rectangular black enclosure with others. The DOM is then applied to the unsteady thermal development in two-phase media contained in a rectangular enclosure. A parametric study is performed by changing the gas and particle absorption coefficients, particle number density, particle emissivity, wall emissivity, and aspect ratio of the enclosure. The results confirm a significant effect of the two-phase radiation on the thermal development in the geometry. However, it is found that the conduction is predominant near the hot wall.
Publisher
TAYLOR FRANCIS INC
Issue Date
2002-02
Language
English
Article Type
Article
Keywords

DISCRETE ORDINATES METHOD

Citation

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, v.41, no.3, pp.285 - 305

ISSN
1040-7782
URI
http://hdl.handle.net/10203/6971
Appears in Collection
AE-Journal Papers(저널논문)
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