Application of composition PDF methods in the investigation of turbulence–radiation interactions

Li, Genong; Modest, Michael F.

doi:10.1016/s0022-4073(01)00218-7

Cited by 104 publications

(63 citation statements)

References 10 publications

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“…Such methods have been introduced to the study of turbulence-radiation interactions by Mazumder and Modest [12] and by Li and Modest [13]. Mazumder and Modest [12] employed the velocity-composition joint PDF method in their simulation of a bluff body combustor and found inclusion of the absorption coefficient-temperature correlation alone may increase radiative heat flux by 40-45%.…”

Section: Introductionmentioning

confidence: 99%

“…For the purpose of capturing TRI, the composition PDF method is as rigorous as the velocitycomposition joint PDF method, but computationally more robust and more efficient. Its use in the study of TRI was demonstrated by Li and Modest [13]. By employing the same method, this paper aims to check the importance of turbulence-radiation interactions, and the relative importance of the different contributions to TRI.…”

Section: Introductionmentioning

confidence: 99%

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Importance of Turbulence-Radiation Interactions in Turbulent Diffusion Jet Flames

Modest

2003

Journal of Heat Transfer

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116

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Traditional modeling of radiative transfer in reacting flows has ignored turbulence-radiation interactions (TRI). Radiative fluxes, flux divergences and radiative properties have been based on mean temperature and concentration fields. However, both experimental and theoretical work have suggested that mean radiative quantities may differ significantly from those predictions based on the mean parameters because of their strongly nonlinear dependence on the temperature and concentration fields. The composition PDF method is able to consider many nonlinear interactions rigorously, and the method is used here to study turbulence-radiation interactions. This paper tries to answer two basic questions: (1) whether turbulence-radiation interactions are important in turbulent flames or not; (2) if they are important, then what correlations need to be considered in the simulation to capture them. After conducting many flame simulations, it was observed that, on average, TRI effects account for about 1/3 of the total drop in flame peak temperature caused by radiative heat losses. In addition, this study shows that consideration of the temperature self correlation alone is not sufficient to capture TRI, but that the complete absorption coefficient-Planck function correlation must be considered.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Importance of Turbulence-Radiation Interactions in Turbulent Diffusion Jet Flames

Modest

2003

Journal of Heat Transfer

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116

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“…The most recent literature has been focused on analyzing the most important TRI correlations (temperature self-correlation, absorption coefficient-temperature correlation, absorption coefficient self-correlation, and absorption coefficient-radiation intensity correlation). Some examples of coupled investigations were reported in Li and Modest (2002a), Habibi et al (2007a), Poitou et al (2012) and Gupta et al (2013). Results pointed that the absorption coefficient-temperature correlation and the temperature selfcorrelation are the most important TRI terms in reactive flows Modest, 2002a, 2002b;Gupta et al, 2013;Habibi et al, 2007b).…”

Section: Introductionmentioning

confidence: 99%

Um estudo numérico da influência da radiação sobre a turbulência em uma chama turbulenta 2D axissimétrica

Centeno

Santos

Silva³

et al. 2016

ete

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Abstract. This paper presents a study of the influence of thermal radiation on turbulence in the simulation of a turbulent, non-premixed methane-air flame. In such a problem, two aspects need to be considered for a precise evaluation of the thermal radiation: the turbulence-radiation interactions (TRI), and the radiative properties of the participating species, which are treated here with the weighted-sum-of-gray-gases (WSGG) model based on recently obtained correlations from HI-TEMP2010 database. The chemical reactions rates were considered as the minimum values between the Arrhenius and Eddy Break-Up rates. A twostep global reaction mechanism was employed, while the turbulence modeling was considered via Resumo. Este artigo apresenta um estudo da influência da radiação térmica sobre a turbulência através da simulação de uma chama turbulenta, não pré-misturada, de metano-ar. Neste problema dois aspectos precisam ser considerados para uma avaliação precisa da radiação térmica: interações turbulência-radiação (TRI) e as propriedades radiativas das espécies participantes, as quais são tratadas aqui com o modelo da soma ponderada de gases cinza (WSGG) baseado em correlações recentemente obtidas a partir do banco de dados espectrais HITEMP2010. As taxas das reações químicas foram consideradas como os menores valores entre as taxas de Arrhenius e de Eddy Break-Up. Um mecanismo de reação global de duas etapas foi empregado, enEste é um artigo de acesso aberto, licenciado por Creative Commons Atribuição 4.0 International (CC-BY 4.0), sendo permitidas reprodução, adaptação e distribuição desde que o autor e a fonte originais sejam creditados. 56

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“…Experimental investigations by Faeth and Gore [18][19][20][21][22][23][24][25][26][27][28][29][30][31] and probability density function (PDF) based calculations [32][33][34][35][36] have shown that TRI always increases the heat loss from a flame, and this additional heat loss can reach 60% of the total and more, leading to a reduction in the local gas temperature of 200…”

Section: Introductionmentioning

confidence: 99%

Optical Determination of Temperature and Species Concentration for Homogeneous Turbulent Gas Medium

Ren¹,

Modest²

2016

Proceeding of First Thermal and Fluids Engineering Summer Conference

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In this study, we present an inverse calculation model to reconstruct time-averaged temperature, species concentration and their root mean square (rms) values from optical synthetic measurements for a homogeneous turbulent gaseous medium. The model is based on line-of-sight spectral transmissivity synthetic measurements, and time-averaged transmissivities and their rms values are successfully related to time-averaged temperatures, species concentrations and their rms values by considering interaction between turbulence and radiation (TRI). The turbulence length scale is also retrieved simultaneously with the turbulent scalars. In order to validate the model, a stochastic approach is used to generate synthetic turbulent fields (fluctuations of temperature and species concentration), and measured spectra are synthesized through calculations from HITEMP 2010 for different spectral bands of CO 2 , H 2 O and CO.

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Application of composition PDF methods in the investigation of turbulence–radiation interactions

Cited by 104 publications

References 10 publications

Importance of Turbulence-Radiation Interactions in Turbulent Diffusion Jet Flames

Importance of Turbulence-Radiation Interactions in Turbulent Diffusion Jet Flames

Um estudo numérico da influência da radiação sobre a turbulência em uma chama turbulenta 2D axissimétrica

Optical Determination of Temperature and Species Concentration for Homogeneous Turbulent Gas Medium

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