Journal ArticleDOI
The Spectral Line-Based Weighted-Sum-of-Gray-Gases Model in Nonisothermal Nonhomogeneous Media
M. K. Denison,Brent W. Webb +1 more
TLDR
In this paper, a spectral-line weighted-sum-of-gray-gases (SLW) model was extended to nonisothermal, nonhomogeneous media and a spatial dependence of the gray gas absorption cross sections on local temperature, pressure, and mole fraction was introduced through the absorption-line blackbody distribution function.Abstract:
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-by-line benchmarks. 16 refs., 7 figs.read more
Citations
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Handbook of heat transfer
TL;DR: In this article, the analogy between heat and mass transfer is covered and applied in the analysis of heat transfer by conduction, convection and radiation, and the analysis is performed by using the handbook of numerical heat transfer.
Journal ArticleDOI
The Full-Spectrum Correlated-k Distribution for Thermal Radiation From Molecular Gas-Particulate Mixtures
Michael F. Modest,Hongmei Zhang +1 more
TL;DR: In this paper, a new Full-Spectrum Correlated-κ Distribution (FSCD) was developed, which provides an efficient means for accurate radiative transfer calculations in absorbing/emitting molecular gases.
Journal ArticleDOI
Numerical simulation of the interaction between turbulence and radiation in reactive flows
TL;DR: The interaction between turbulence and radiation (TRI) in reactive flows has been demonstrated experimentally, theoretically and numerically, and results from the highly nonlinear coupling between fluctuations of radiation intensity and fluctuations of temperature and chemical composition of the medium.
Journal ArticleDOI
Account for variations in the H2O to CO2 molar ratio when modelling gaseous radiative heat transfer with the weighted-sum-of-grey-gases model
TL;DR: In this paper, a modified weighted-sum-of-grey-gases (WSGG) model is proposed to account for various ratios of H2O to CO2 concentrations.
Journal ArticleDOI
Narrow-band and full-spectrum k-distributions for radiative heat transfer—correlated-k vs. scaling approximation
TL;DR: In this article, the correlated-k and scaled-k distribution methods for radiative heat transfer in molecular gases are developed based on precise mathematical principles, for both narrow band and full spectrum models.
References
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Journal ArticleDOI
The hitran molecular database: editions of 1991 and 1992
Laurence S. Rothman,Robert R. Gamache,R. H. Tipping,Curtis P. Rinsland,Mary Ann H. Smith,D. Chris Benner,V. Malathy Devi,J. M. Flaud,Claude Camy-Peyret,Agnes Perrin,A. Goldman,Steven T. Massie,Linda R. Brown,Robert A. Toth +13 more
TL;DR: The HITRAN molecular absorption database as mentioned in this paper contains line parameters for 31 species and their isotopomers that are significant for terrestrial atmospheric studies, including chlorofluorocarbons and other molecular species that are not amenable to line-by-line representation.
Journal ArticleDOI
A description of the correlated k distribution method for modeling nongray gaseous absorption, thermal emission, and multiple scattering in vertically inhomogeneous atmospheres
Andrew A. Lacis,Valdar Oinas +1 more
TL;DR: A radiative transfer method for treating nongray gaseous absorption and thermal emission in vertically inhomogeneous multiple scattering atmospheres is described in this paper, where probability density distributions of absorption coefficient strength are derived from line-by-line calculations to construct line-By-line and band model based k distributions.
Journal ArticleDOI
Evaluation of Coefficients for the Weighted Sum of Gray Gases Model
TL;DR: The weighted sum of gray gases model as discussed by the authors is a generalization of the weighted sum-of-gray-gas model, which assumes that total emissivity and absorptivity may be represented by the sum of the gray gas emissivities weighted with a temperature dependent factor.
Journal ArticleDOI
THE CORRELATED-k METHOD FOR RADIATION CALCULATIONS IN NONHOMOGENEOUS ATMOSPHERES
TL;DR: In this article, the accuracy of the correlated-k method for radiation calculations with spectrally averaged data in nonhomogeneous atmospheres is investigated, and it is concluded that the errors in correlated-K are generally of order of magnitude 1 percent, much larger errors occur only when a radiative quantity is very much smaller than its average value, and errors do not systematically increase with the order of differencing.