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Type: Artigo de periódico
Title: Application of a local-spectrum correlated model to modeling radiative transfer in a mixture of real gas media in bidimensional enclosures
Author: Ismail, KAR
Salinas, CT
Abstract: Calculating radiative transport through nongray gases as combustion gases, atmospheric gases, and others is extremely difficult because of the strong spectral variation of the absorption coefficients of molecular gases. In the local-spectrum correlated model the spectral integration of the radiative transfer equation (RTE) is performed using one new gas absorption spectrum distribution function termed the cumulative wavenumber (CW). The CW model was first coupled with the discrete ordinates method to solve the transformed RTE. The accuracy of the model and algorithm first was examined for the one-dimensional homogeneous media, and results are compared with line-by-line calculations. It is found that the CW model is exact for homogeneous media, and inhomogeneous cases are examined. Then the CW model is implemented in a bidimensional enclosure with diffuse reflecting boundaries containing a mixture of real gases in isothermal and in strong nonisothermal cases. The spectral databases HITRAN and HITEMP are used to obtain the molecular absorption spectrum of the gases at different temperatures. Different cases are analyzed and results are compared.
Country: EUA
Editor: Taylor & Francis Inc
Rights: fechado
Identifier DOI: 10.1080/10407780490508322
Date Issue: 2005
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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