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TECHNICAL PAPERS: Radiative Heat Transfer

Scalable Multi-Group Full-Spectrum Correlated-k Distributions for Radiative Transfer Calculations

[+] Author and Article Information
Hongmei Zhang, Michael F. Modest

Department of Mechanical and Nuclear Engineering, Penn State University, University Park, PA 16802

J. Heat Transfer 125(3), 454-461 (May 20, 2003) (8 pages) doi:10.1115/1.1560156 History: Received May 20, 2002; Revised November 06, 2002; Online May 20, 2003
Copyright © 2003 by ASME
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References

Figures

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A small portion of the 15 μm CO2 band broken up into two groups using Multi-Group approach
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Two-Group results for the heat flux exiting from the cold column of a two-column CO2-nitrogen mixture at different temperatures (Thot=2000 K,lhot=50 cm;Tcold=300 K,lcold variable; uniform p=1 bar,xCO2=0.1, cold and black bounding walls)
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The scaling function uη for several spectral locations across the 2350–2450 cm−1 spectral range of CO2, where, ϕ_0=(300 K, 1 bar, 10 percent)
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The scaling function uη for several spectral locations across the 3400–3500 cm−1 spectral range of CO2, where ϕ_0=(300 K, 1 bar, 10 percent)
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Standard scaling functions for CO2
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The absorption coefficient spectrum of CO2 at 300 K and 1 bar, together with three typical spectral groups for CO2
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Variation of scaling function um(2000 K,300 K,g) with cumulative k-distribution g for CO2 base groups
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Original and smoothened cumulative k-distribution stretching factor g/gref
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Original and smoothened weight functions a and cumulative k-distributions
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Combination of two spectral groups into one (CO2 groups 3 and 4)
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Radiative flux exiting from the cold column of a two-column CO2-nitrogen mixture at different temperatures (Thot=2000 K,lhot=50 cm;Tcold=300 K,lcold variable; uniform p=1 bar,xCO2=0.1, cold and black walls on both sides) and their relative error compared with the LBL benchmark
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Same as Fig. 11, except that xhot=0.2,xcold=0.5 and the left wall is at 1000 K

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