The spectral-line weighted-sum-of-gray-gases model for H{sub 2}O/CO{sub 2} mixtures

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · Journal of Heat Transfer

DOI:https://doi.org/10.1115/1.2822652· OSTI ID:478493

Denison, M K; Webb, B W ^[1]

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1. Brigham Young Univ., Provo, UT (United States)

The weighted-sum-of-gray-gases model, first introduced by Hottel and Sarofim for expressing total gas emissivities and in the context of the zone method, has recently been extended to the general form of the radiative transfer equation (RTE). The fundamental radiative property of the model is the locally defined absorption coefficient, which permits the use of arbitrary solution methods of the RTE. Denison and Webb developed a spectral line-based weighted-sum-of-gray-gases (SLW) model by constructing a histogram representation of the high-resolution spectra of H{sub 2}O. Subsequently, a novel absorption-line black body distribution function was developed that easily allows the black body weights a{sub j} of any desired number of gray gases to be determined by simple differencing rather than accessing detailed spectral line information. The distribution function also provides the means of incorporating a spatial dependence of the gray gas absorption cross sections on temperature, pressure, and species mole in nonisothermal, nonhomogeneous problems. 15 refs., 3 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 478493
• Journal Information: Journal of Heat Transfer, Journal Name: Journal of Heat Transfer Journal Issue: 3 Vol. 117; ISSN JHTRAO; ISSN 0022-1481
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
99 GENERAL AND MISCELLANEOUS
ABSORPTION SPECTRA
BINARY MIXTURES
CARBON DIOXIDE
DISTRIBUTION FUNCTIONS
EMISSIVITY
HEAT TRANSFER
WATER