RESEARCH PAPERS: Radiative Transfer

The Spectral Line-Based Weighted-Sum-of-Gray-Gases Model in Nonisothermal Nonhomogeneous Media

[+] Author and Article Information
M. K. Denison, B. W. Webb

Brigham Young University, Provo, UT 84602

J. Heat Transfer 117(2), 359-365 (May 01, 1995) (7 pages) doi:10.1115/1.2822530 History: Received November 01, 1993; Revised May 01, 1994; Online December 05, 2007


An approach is developed to extend the previously developed spectral-line weighted-sum-of-gray-gases (SLW) model to nonisothermal, nonhomogeneous media. The distinguishing feature of the SLW gas property model is that it has been developed for use in arbitrary solution methods of the radiative transfer equation (RTE). A spatial dependence of the gray gas absorption cross sections on local temperature, pressure, and mole fraction is introduced through the absorption-line blackbody distribution function. Incorporating this spatial dependence results in significant improvement over the use of spatially uniform gray gas absorption cross sections in comparisons with line-byline benchmarks.

Copyright © 1995 by The American Society of Mechanical Engineers
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