Radiative transfer effects of an axisymmetric particulate jet into a cylindrical pipe

Boutoub, Ahmed; Ettouati, H.; Benticha, H.; Sassi, Mohamed

doi:10.1007/s00231-006-0152-4

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…When performing CFD simulations, particle radiation is often included and found to be important [1,2,3]. If, on the other hand, one does not perform a full CFD simulation but is rather interested in solving single particle physics and chemistry in high detail one often neglects, or partly neglects, radiation.…”

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confidence: 99%

Modeling radiation in particle clouds: on the importance of inter-particle radiation for pulverized solid fuel combustion

Haugen

Mitchell

2014

Heat Mass Transfer

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The importance of inter-particle radiation for clusters of gray and diffuse particles is investigated. The radiative cooling of each individual particle is found to vary strongly with its position in the cluster, and a "mean" radiative particle cooling term is proposed for single particle simulations of particle clusters or for high detail simulation, like Direct Numerical Simulations of small sub-volumes of large clusters of particles. Radiative cooling is shown to be important both for furnaces for coal gasification and coal combustion. Broadening the particle size distribution is found to have just a minor effect on the radiative particle cooling. This is particularly the case for large and dense particle clusters where there is essentially no effect of size distribution broadening at all. For smaller and more dilute particle clusters, the effect of distribution broadening is clear but still not dominant.

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confidence: 99%

Modeling radiation in particle clouds: on the importance of inter-particle radiation for pulverized solid fuel combustion

Haugen

Mitchell

2014

Heat Mass Transfer

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“…The details of computing the scattering coefficients and phase function are found in Boutoub et al (2004). Since the radiative intensity is a function of position and direction, both spatial and directional discretizations are needed.…”

Section: Radiationmentioning

confidence: 99%

Numerical modelling and simulation of pulverized solid‐fuel combustion in swirl burners

et al. 2009

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A finite-volume numerical model for computer simulation of pulverized solid-fuel combustion in furnaces with axisymmetric-geometry swirl burner is presented. The simulation model is based on the k − ε single phase turbulence model, considering the presence of the dispersed solid phase via additional source terms in the gas phase equations. The dispersed phase is treated by the particle source in cell (PSIC) method. Solid fuel particle devolatilization, homogenous and heterogeneous chemical reaction processes are modelled via a global combustion model. The radiative heat transfer equation is also resolved using the finite volume method. The numerical simulation code is validated by comparing computational and experimental results of pulverized coal in an experimental furnace equipped with a swirl burner. It is shown that the developed numerical code can successfully predict the flow field and flame structure including swirl effects and can therefore be used for the design and optimization of pulverized solid-fuel swirl burners.On présente un modèle numérique de volumes finis pour la simulation par ordinateur de la combustion de combustibles solides pulvérisés dans des fours munis de brûleurà tourbillon axisymétrique. Le modèle de simulation repose sur le modèle de turbulence monophasique k − ε, et décrit la présence de la phase solide dispersée par le biais de termes-sources additionnels dans leséquations de la phase gazeuse. La phase dispersée est traitée par la méthode PSIC. La dévolatilisation des particules combustibles solides et les procédés de réaction chimique homogène et hétérogène sont modélisésà l'aide d'un modèle de combustion global. L'équation de transfert de chaleur radiatif estégalement résolue par la méthode des volumes finis. Le code de simulation numérique aété validé en comparant les résultats des calculs par ordinateur avec des expériences pour du charbon pulvérisé dans un four expérimentaléquipé d'un brûleurà tourbillon. On montre que le code numérique peut prédire avec succès le champ d'écoulement et la structure de flamme y compris les effets tourbillonnaires et qu'il peut donc servirà la conception età l'optimisation des brûleursà tourbillons pour les combustibles solides pulvérisés.

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Radiative transfer effects of an axisymmetric particulate jet into a cylindrical pipe

Cited by 2 publications

References 21 publications

Modeling radiation in particle clouds: on the importance of inter-particle radiation for pulverized solid fuel combustion

Modeling radiation in particle clouds: on the importance of inter-particle radiation for pulverized solid fuel combustion

Numerical modelling and simulation of pulverized solid‐fuel combustion in swirl burners

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