An absorption-line blackbody distribution function for efficient calculation of total gas radiative transfer

Details An absorption-line blackbody distribution function for efficient calculation of total gas radiative transfer An absorption-line blackbody distribution function for efficient calculation of total gas radiative transfer

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jqsrt..50..499d&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 50, no. 5, p. 499-510

Statistics

Computation

14

Absorption Spectra, Black Body Radiation, Distribution Functions, Radiative Transfer, Water Vapor, Algorithms, Computerized Simulation, Data Correlation, Emissivity, Line Spectra

Scientific paper

An absorption-line blackbody distribution function for H2O which provides an efficient means for total radiative transfer calculations is presented. The function eliminates the need to specify a path-length required by current narrow and wide band models since the basic radiative property is the locally defined absorption coefficient. This allows the model to be used with arbitrary solution methods of the radiative transfer equation which requires the absorption coefficient as input. A simple mathematical correlation is presented for use in computer algorithms. A few sample calculations of total emissivity as well as numerical solutions to the radiative transfer equation with the use of the distribution function are performed. The model shows good agreement with Hottel's total emissivity data. There is also very good agreement between the model and computationally intensive line-by-line calculations in isothermal media of uniform composition. The function may also be used for approximate calculations in non-uniform media.

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