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- W2023889568 abstract "Radiative heat transfer in absorbing, emitting, and scattering media is a problem of practical significance, e.g., in the design of industrial furnaces and many combustion devices, and in the prediction of the effect of ducts, CO{sub 2} and other participating gases on the global environment. Recently, much attention has been given to solve the problem using numerical approaches such as the Monte Carlo method by Farmer and Howell (1994), the discrete ordinate method by Fiveland and Jessee (1995), and the YIX method by Hsu et al. (1992). A solution method that is reasonably accurate, efficient in both computing time and storage, flexible with arbitrary three-dimensional geometry, and can be applied to real gas and particles is needed for the prediction of the radiation transport. The radiation element method by the ray emission model, REM (Maruyama and Aihara 1997), is an extension of the zone method and is a generalized numerical method for analyzing radiation transfer in participating media and specular and/or diffuse surfaces, with which arbitrary configurations can be coped with easily using finite element grids. In this paper, the REM is developed to incorporate the spectral dependence of radiation properties using the narrow band model and assuming anisotropic scattering.more » The zeroth-order delta function approximation is used to scale the anisotropic scattering. The radiative heat transfer within a complex three-dimensional boiler furnace is analyzed as an example of application of engineering interest. Both the Elsasser narrow band model and the exponential wide-band model are adopted to consider the spectral characteristics of CO{sub 2} and H{sub 2}O gases. The results of heat flux on the walls and heat flux divergence in the boiler are compared between the analyses of the narrow-band model and the wide-band model. The effects of the anisotropic scattering and particle density are also discussed.« less" @default.
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- W2023889568 date "1999-08-01" @default.
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- W2023889568 title "Radiative Heat Transfer in Arbitrary Configurations With Nongray Absorbing, Emitting, and Anisotropic Scattering Media" @default.
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- W2023889568 doi "https://doi.org/10.1115/1.2826040" @default.
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