Improved full-spectrum k-distribution implementation for inhomogeneous media using a narrow-band database

Cai, Jian; Modest, Michael F.

doi:10.1016/j.jqsrt.2014.02.028

Cited by 75 publications

(49 citation statements)

References 16 publications

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“…To test the efficiency of the FSK look-up table, CPU times of generating k-distributions for arbitrary gas mixtures at arbitrary thermodynamic states are compared using FSK generation based on exact FSK, assembly from the narrow-band database [12], from correlations [18,19] and from the look-up table developed in this paper, respectively. Since the correlations can be used only at 1 bar, the pressure for all arbitrary k-distributions is fixed to 1 bar.…”

Section: Efficiency Investigationmentioning

confidence: 99%

“…The results using the narrow-band database employed the MRmixing model have been presented by Cai and Modest [12]. As shown in Fig.…”

Section: Flame Calculationmentioning

confidence: 99%

“…To overcome this drawback, Wang and Modest [11] described a narrowband database for individual species, from which FSKs can be assembled efficiently by applying an appropriate mixing model. Cai and Modest [12] regenerated the narrowband database using the newest HITEMP 2010 [13]. However, the mixing process for gas mixtures is computationally expensive, and creation of a single FSK for a twogas mixture still requires between 0.0549 s to 0.469 s, depending on the mixing model [14].…”

Section: Introductionmentioning

confidence: 99%

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A full-spectrum k-distribution look-up table for radiative transfer in nonhomogeneous gaseous media

Wang

Modest

et al. 2016

Journal of Quantitative Spectroscopy and Radiative Transfer

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a b s t r a c tA full-spectrum k-distribution (FSK) look-up table has been constructed for gas mixtures within a certain range of thermodynamic states for three species, i.e., CO 2 , H 2 O and CO. The k-distribution of a mixture is assembled directly from the summation of the linear absorption coefficients of three species. The systematic approach to generate the table, including the generation of the pressure-based absorption coefficient and the generation of the k-distribution, is discussed. To efficiently obtain accurate k-values for arbitrary thermodynamic states from tabulated values, a 6-D linear interpolation method is employed. A large number of radiative heat transfer calculations have been carried out to test the accuracy of the FSK look-up table. Results show that, using the FSK look-up table can provide excellent accuracy compared to the exact results. Without the time-consuming process of assembling k-distribution from individual species plus mixing, using the FSK look-up table can save considerable computational cost. To evaluate the accuracy as well as the efficiency of the FSK look-up table, radiative heat transfer via a scaled Sandia D Flame is calculated to compare the CPU execution time using the FSK method based on the narrow-band database, correlations, and the look-up table. Results show that the FSK look-up table can provide a computationally cheap alternative without much sacrifice in accuracy.

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Section: Efficiency Investigationmentioning

confidence: 99%

“…The results using the narrow-band database employed the MRmixing model have been presented by Cai and Modest [12]. As shown in Fig.…”

Section: Flame Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A full-spectrum k-distribution look-up table for radiative transfer in nonhomogeneous gaseous media

Wang

Modest

et al. 2016

Journal of Quantitative Spectroscopy and Radiative Transfer

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show abstract

“…The regression scheme utilizes a narrowband k-distribution database [31,32]. Three species (CO 2 , CO and H 2 O) are considered for radiation calculations.…”

Section: Regression Scheme For Heat Source Splittingmentioning

confidence: 99%

“…This distribution is binned into three phases with equal probability. The nominal particle sizes (d 32 The carrier gas is modeled as ideal. Seven gas species are considered, namely N 2 , O 2 , CO 2 , CO, H 2 O, H 2 and CH 4 .…”

Section: Numerical Configurationsmentioning

confidence: 99%