Relevant bibliographies by topics / Weighted sum-of-gray-gases model

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Weighted sum-of-gray-gases model'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Weighted sum-of-gray-gases model"

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Crnomarkovic, Nenad, Srdjan Belosevic, Ivan Tomanovic, and Aleksandar Milicevic. "Influence of the gray gases number in the weighted sum of gray gases model on the radiative heat exchange calculation inside pulverized coal-fired furnaces." Thermal Science 20, suppl. 1 (2016): 197–206. http://dx.doi.org/10.2298/tsci150603206c.

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The influence of the number of gray gases in the weighted sum in the gray gases model on the calculation of the radiative heat transfer is discussed in the paper. A computer code which solved the set of equations of the mathematical model describing the reactive two-phase turbulent flow with radiative heat exchange and with thermal equilibrium between phases inside the pulverized coal-fired furnace was used. Gas-phase radiative properties were determined by the simple gray gas model and two combinations of the weighted sum of the gray gases models: one gray gas plus a clear gas and two gray ga
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Lee, Sung Nam, and Seung Wook Baek. "Analysis of Radiative Heat Flux for Nozzle Flow." Applied Mechanics and Materials 110-116 (October 2011): 3025–30. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.3025.

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— A finite volume method with non-gray gas model is applied to investigate radiative heat flux on the inside wall of nozzle. The radiative properties of non-gray gas are predicted by using weighted sum of gray gases model (WSGGM). Again, 4 gray gases and narrow band based WSGGM is used to predict total heat flux and spectral intensity on the nozzle wall. Finally, the hybrid use of 4 gray gases and narrow band based model is applied to reduce computational time preserving accuracy.
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Modest, M. F. "The Weighted-Sum-of-Gray-Gases Model for Arbitrary Solution Methods in Radiative Transfer." Journal of Heat Transfer 113, no. 3 (1991): 650–56. http://dx.doi.org/10.1115/1.2910614.

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The weighted-sum-of-gray-gases approach for radiative transfer in nongray participating media, first developed by Hottel in the context of the zonal method, has been shown to be applicable to the general radiative equation of transfer. Within the limits of the weighted-sum-of-gray-gases model (nonscattering media within a black-walled enclosure), any nongray radiation problem can be solved by any desired solution method after replacing the medium by an equivalent small number of gray media with constant absorption coefficients. Some examples are presented for isothermal media and media at radi
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Krishnamoorthy, Gautham. "A new weighted-sum-of-gray-gases model for oxy-combustion scenarios." International Journal of Energy Research 37, no. 14 (2012): 1752–63. http://dx.doi.org/10.1002/er.2988.

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Denison, M. K., and B. W. Webb. "A Spectral Line-Based Weighted-Sum-of-Gray-Gases Model for Arbitrary RTE Solvers." Journal of Heat Transfer 115, no. 4 (1993): 1004–12. http://dx.doi.org/10.1115/1.2911354.

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This paper presents an approach for generating weighted-sum-of-gray gases (WSGG) models directly from the line-by-line spectra of H2O. Emphasis is placed on obtaining detailed spectral division among the gray gases. Thus, for a given model spectrum, the gray gas weights are determined as blackbody fractional functions for specific subline spectral regions at all temperatures. The model allows the absorption coefficient to be the basic radiative property rather than a transmissivity or band absorptance, etc., and can be used with any arbitrary solution method for the Radiative Transfer Equation
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Chu Hua-Qiang, Feng Yan, Cao Wen-Jian, Ren Fei, and Gu Ming-Yan. "Comprehensive evaluation and analysis of the weighted-sum-of-gray-gases radiation model." Acta Physica Sinica 66, no. 9 (2017): 094207. http://dx.doi.org/10.7498/aps.66.094207.

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Denison, M. K., and B. W. Webb. "The Spectral Line-Based Weighted-Sum-of-Gray-Gases Model in Nonisothermal Nonhomogeneous Media." Journal of Heat Transfer 117, no. 2 (1995): 359–65. http://dx.doi.org/10.1115/1.2822530.

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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 spa
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Shan, Shiquan, Zhijun Zhou, Liping Chen, Zhihua Wang, and Kefa Cen. "New weighted-sum-of-gray-gases model for typical pressurized oxy-fuel conditions." International Journal of Energy Research 41, no. 15 (2017): 2576–95. http://dx.doi.org/10.1002/er.3838.

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Denison, M. K., and B. W. Webb. "The Spectral-Line Weighted-Sum-of-Gray-Gases Model for H2O/CO2 Mixtures." Journal of Heat Transfer 117, no. 3 (1995): 788–92. http://dx.doi.org/10.1115/1.2822652.

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Krishnamoorthy, Gautham. "A new weighted-sum-of-gray-gases model for CO2–H2O gas mixtures." International Communications in Heat and Mass Transfer 37, no. 9 (2010): 1182–86. http://dx.doi.org/10.1016/j.icheatmasstransfer.2010.07.007.

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Dissertations / Theses on the topic "Weighted sum-of-gray-gases model"

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Fonseca, Roberta Juliana Collet da. "Aplicação do modelo da soma-ponderada-de-gases-cinza a sistemas com superfícies não cinzas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/163315.

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A radiação térmica é o principal mecanismo de transferência de calor em fenômenos que envolvem meios participantes em temperaturas elevadas, tais como em processos de combustão. A dependência fortemente irregular do coeficiente de absorção em relação ao número de onda torna desafiador o estudo de situações em que a radiação é apenas parte de um problema mais complexo. A exatidão do cálculo da radiação fica condicionada à solução da equação da transferência radiativa (RTE) por meio da integração linha-por-linha (LBL), sendo, muitas vezes, impraticável, em virtude do esforço computacional requer
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Dorigon, Leonardo Jovani. "Determinação dos coeficientes para o modelo da soma-poderada-dos-gases-cinzas a partir do banco de dados HITEMP 2010." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/55459.

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Neste trabalho são obtidos os coeficientes do modelo da Soma-Ponderada-dos-gases-cinza (WSGG) a partir do banco de dados HITEMP 2010, permitindo o uso do modelo com os dados mais precisos disponíveis atualmente. Neste trabalho também se faz uma comparação dos valores de emitância total obtidos a partir do modelo WSGG com valores benchmark, obtidos nesse trabalho, mostrando uma excelente concordância. Com os coeficientes obtidos, problemas unidimensionais de transferência de calor radiante são resolvidos de modo a comparar a solução obtida pelo modelo WSGG com a solução obtida pela integração L
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Rodrigues, Luís Gustavo Pires. "Aplicação do modelo da soma-ponderada-de-gases-cinza na simulação da transferência radiativa em chamas difusivas laminares de metano diluído com CO2 e N2." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/151382.

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Simulações acopladas do escoamento reativo e dos processos de transferência de calor para o estudo de chamas são problemas dispendiosos computacionalmente. A transferência de calor por radiação em processos de combustão, devido às elevadas temperaturas, é o processo de troca energética dominante. Ainda, o comportamento altamente irregular do coeficiente de absorção com o comprimento de onda se constitui em uma dificuldade adicional na modelagem da transferência radiativa em meios participantes. Para contornar essa dificuldade modelos espectrais foram desenvolvidos com o objetivo de simular o c
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Cayan, Fatma Nihan. "The Method Of Lines Solution Of Discrete Ordinates Method For Nongray Media." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607401/index.pdf.

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A radiation code based on method of lines (MOL) solution of discrete ordinates method (DOM) for the prediction of radiative heat transfer in nongray absorbing-emitting media was developed by incorporation of two different gas spectral radiative property models, namely wide band correlated-k (WBCK) and spectral line-based weighted sum of gray gases (SLW) models. Predictive accuracy and computational efficiency of the developed code were assessed by applying it to the predictions of source term distributions and net wall radiative heat fluxes in several one- and two-dimensional test problems inc
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Fraga, Guilherme Crivelli. "Análise da influência das propriedades radiativas de um meio participante na interação turbulência-radiação em um escoamento interno não reativo." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/142495.

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A interação turbulência-radiação (TRI, do inglês Turbulence-Radiation Interaction) resulta do acoplamento altamente não linear entre flutuações da intensidade de radiação e flutuações da temperatura e da composição química do meio, e tem-se demonstrado experimentalmente, teoricamente e numericamente que este é um fenômeno relevante em diversas aplicações envolvendo altas temperaturas, especialmente em problemas reativos. Neste trabalho, o TRI é analisado em um escoamento interno não reativo de um gás participante que se desenvolve em um duto de seção transversal quadrada, para diferentes inten
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Book chapters on the topic "Weighted sum-of-gray-gases model"

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Webb, Brent W., Vladimir P. Solovjov, and Frédéric André. "The spectral line weighted-sum-of-gray-gases (SLW) model for prediction of radiative transfer in molecular gases." In Advances in Heat Transfer. Elsevier, 2019. http://dx.doi.org/10.1016/bs.aiht.2019.08.003.

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Conference papers on the topic "Weighted sum-of-gray-gases model"

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Denison, Martin K., and Brent W. Webb. "k-DISTRIBUTIONS AND WEIGHTED-SUM-OF-GRAY-GASES-A HYBRID MODEL." In International Heat Transfer Conference 10. Begellhouse, 1994. http://dx.doi.org/10.1615/ihtc10.4890.

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Denison, Martin K., and Brent W. Webb. "THE SPECTRAL LINE WEIGHTED-SUM-OF-GRAY-GASES MODEL-A REVIEW." In Radiative Transfer I. Proceedings of the First International Symposium on Radiation Transfer. Begellhouse, 1995. http://dx.doi.org/10.1615/ichmt.1995.radtransfproc.160.

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Roberta Juliana Collet da Fonseca, Aline Ziemniczak, and Francis Henrique Ramos França. "Application of the weighted-sum-of-gray-gases model in enclosures with gray surfaces." In 23rd ABCM International Congress of Mechanical Engineering. ABCM Brazilian Society of Mechanical Sciences and Engineering, 2015. http://dx.doi.org/10.20906/cps/cob-2015-0769.

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França, Francis, and Roberta Juliana Collet da Fonseca. "Application of the weighted-sum-of-gray-gases model in media bounded by non-gray walls." In 16th Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2016. http://dx.doi.org/10.26678/abcm.encit2016.cit2016-0377.

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Brittes, Rogério, Fabiano Cassol, Felipe Roman Centeno, and Francis H. R. França. "A Novel WSGG Model Based on Weighted Absorption-Emission Coefficients." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52946.

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The absorption coefficient of participating species, such as CO2 and H2O, shows very irregular dependence with the wavenumber, which makes it difficult the spectral integration of the radiative transfer equation (RTE). This task can be performed with the line-by-line (LBL) integration, which is very computationally expensive due to the vast amount of spectral lines that span the spectrum. As alternatives to the LBL integration, there are global models, such as the weighted-sum-of-gray-gases (WSGG) and the spectral line weighted-sum-of-gray gases (SLW). These models replace the integration with
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Aline Ziemniczak, Rogério Brittes, Felipe Roman Centeno, and Francis Henrique Ramos França. "Generation of new correlations for the weighted-sum-of-gray-gases model for carbon monoxide." In 23rd ABCM International Congress of Mechanical Engineering. ABCM Brazilian Society of Mechanical Sciences and Engineering, 2015. http://dx.doi.org/10.20906/cps/cob-2015-0755.

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Pires Rodrigues, Luís Gustavo, Aline Ziemniczak, and Francis França. "RADIATION CALCULATIONS ON FLUENT CFD: THREE APPROACHES FOR THE WEIGHTED-SUM-OF-GRAY-GASES MODEL." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-2928.

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Collet da Fonseca, Roberta Juliana, and Francis França. "Application of the weighted-sum-of-gray-gases model to non-homogeneous H2O/CO2 mixtures for media with non-gray walls." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-0857.

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Liu, Fengshan, Huaqiang Chu, and Jean-Louis Consalvi. "RELATIONSHIP BETWEEN THE SPECTRAL LINE BASED WEIGHTED-SUM-OF-GRAY-GASES MODEL AND THE FULL SPECTRUM K-DISTRIBUTION MODEL." In RAD-13. Proceedings of the 7th International Symposium on Radiative Transfer, June 2-8, 2013, Kusadasi, Turkey. Begellhouse, 2013. http://dx.doi.org/10.1615/ichmt.2013.intsympradtransf.300.

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Darbandi, Masoud, Bagher Abrar, and Gerry E. Schneider. "Application of an Optimized SLW Model to Calculation of Non-Gray Radiation Heat Transfer in a Furnace." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-53213.

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The spectral line based weighted sum of gray gases (SLW) model is considered as an advanced model, which can solve the radiative transfer equation (RTE) in non-gray participating media by dividing the absorption cross section spectrum into a limited number of intervals. Each interval is then treated as a gray gas medium, in which the attributed RTE should be solved separately. Therefore, the SLW model would be computationally more efficient than the other non-gray participating media solvers because it is faced with a small number of RTE solutions. In this work, we present a novel optimized SL
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