Measurement and numerical simulation of soot particle size distribution functions in a laminar premixed ethylene-oxygen-argon flame

Zhao, Bin; Yang, Zhiwei; Johnston, Murray V.; Wang, Shuangfeng; Wexler, Anthony S.; Balthasar, Michael; Kraft, Markus

doi:10.1016/s0010-2180(02)00574-6

Cited by 248 publications

(176 citation statements)

References 30 publications

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“…As the number of retained moments decreases, more extrapolation (versus interpolation) is required. Moreover, the second-and higher-order moments carry important information about the PSDF and particle morphology, and it has been reported that third and sixth moments can be experimentally evaluated from laser light scattering (LLS) measurements (D'Alessio 1981; Zhao et al 2003). For these reasons, and based on findings from initial numerical tests, a reduction in the order of the Lagrange interpolation was not pursued and six moments were retained.…”

Section: Interpolation Schemesmentioning

confidence: 99%

“…A Monte Carlo (stochastic) approach Zhao et al 2003;Singh et al 2005) tracks a statistically significant number of soot particles individually, and has the potential to provide a very detailed representation of the PSDF. Due to high computational cost, however, the stochastic approach has often been limited to postprocessing of the data rather than being fully integrated with the flow solver.…”

Section: Introductionmentioning

confidence: 99%

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Development of High Fidelity Soot Aerosol Dynamics Models using Method of Moments with Interpolative Closure

Roy

Arias

Lecoustre

et al. 2014

Aerosol Science and Technology

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The method of moments with interpolative closure (MOMIC) for soot formation and growth provides a detailed modeling framework maintaining a good balance in generality, accuracy, robustness, and computational efficiency. This study presents several computational issues in the development and implementation of the MOMIC-based soot modeling for direct numerical simulations (DNS). The issues of concern include a wide dynamic range of numbers, choice of normalization, high effective Schmidt number of soot particles, and realizability of the soot particle size distribution function (PSDF). These problems are not unique to DNS, but they are often exacerbated by the high-order numerical schemes used in DNS. Four specific issues are discussed in this article: the treatment of soot diffusion, choice of interpolation scheme for MOMIC, an approach to deal with strongly oxidizing environments, and realizability of the PSDF. General, robust, and stable approaches are sought to address these issues, minimizing the use of ad hoc treatments such as clipping. The solutions proposed and demonstrated here are being applied to generate new physical insight into complex turbulence-chemistry-soot-radiation interactions in turbulent reacting flows using DNS.

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Section: Interpolation Schemesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of High Fidelity Soot Aerosol Dynamics Models using Method of Moments with Interpolative Closure

Roy

Arias

Lecoustre

et al. 2014

Aerosol Science and Technology

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“…Distribution bimodale (pdf normalisée en fonction du diamètre de la particule primaire (nm)) de tailles de particules à différnets positions dans une flamme d'éthylène. D'après Zhao [7]. m/z 800 300 400 500 6000 700 suie dont la structure tend à se rapprocher de celle du graphite.…”

Section: -P4unclassified

“…De plus la décroissance temporelle du signal d'incandescence est liée à la taille de la particule irradiée : plus la particule est grosse, plus elle met de temps à se refroidir. Sur le plan des distributions de tailles des particules, les méthodes les plus courantes reposent sur l'utilisation de méthodes couplées diffusion de la lumière/extinction [38] ou sur la technique SMPS (scanning mobility particle sizer) [7]. L'interprétation de ces méthodes granulométriques reste très délicate du fait de la morphologie très complexe des particules de suies.…”

Section: Les Méthodes Expérimentales Pour L'analyse De Structure Chimunclassified

Croissance des HAP et des suies et transition phase gaz-phase solide dans les processus de combustion

Desgroux

Bakali

Mercier

2011

EPJ Web of Conferences

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Abstract. This article is addressed to a scientific community familiar to astrophysics, and most researchers are not familiar with combustion science. Thus the goal is to provide a basic understanding of "the flame" and the different steps that lead to soot particle formation in conditions that are generally close to atmospheric pressure and high temperature, i.e. in conditions far from those encountered in most astrophysical media. Some experimental techniques of sooty flame investigations will also be introduced. The main aim is to outline the concepts and the tools of combustion science to facilitate fruitful scientific exchanges between two communities that are motivated by the understanding of the formation and evolution of PAHs and soot-like particles, in completely different environments. It should be noted that the description does not pretend to be exhaustive at all and certain theoretical and experimental approaches are not described nor even mentioned.Résumé. Cet article s'adresse à une communauté «astrophysique» non familière avec la combustion. Il a pour but de donner quelques bases permettant de comprendre «la flamme» et les étapes chimiques principales conduisant à la formation de particules de suie dans un milieu généralement à pression atmosphérique et haute température, c'est-à-dire dans des conditions de pression et température très éloignées de celles rencontrées dans le milieu interstellaire. Certaines méthodes expérimentales d'investigation de flammes suitées sont également présentées. L'objectif étant de pouvoir jeter des ponts entre deux communautés éloignées mais rassemblées par un même intérêt pour les hydrocarbures aromatiques polycycliques et les particules de suie. Il est clair que la présentation qui est faite ici est très succincte et qu'elle fait l'impasse sur certaines théories, approches, méthodes expérimentales. . .

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“…About 80% of soot mass from combustion sources is estimated to originate from surface growth [1]. Recent modeling and interpretation of soot surface growth (e.g., [2][3][4][5][6][7][8][9]) has been done mostly by assumption of chemical similarity to reactions of gaseous aromatic species [10,11] and, specifically, by invoking the HACA mechanism [11][12][13]. This surface growth model is a repetitive reaction sequence of edge surface activation by gaseous hydrogen followed by addition of a gaseous hydrocarbon precursor (acetylene) to the surface radical site formed [12].…”

Section: Introductionmentioning

confidence: 99%

Graphene layer growth: Collision of migrating five-member rings

Whitesides

Kollias

Domin

et al. 2007

Proceedings of the Combustion Institute

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(not included in Total) 144Total 5787Accepted for Oral Presentation and Publication at st International Symposium on CombustionUniversity of Heidelberg, Germany, August 6-11, 20062 Abstract A reaction pathway is explored in which two cyclopenta groups combine on the zigzag edge of a graphene layer. The process is initiated by H addition to a five-membered ring, followed by opening of that ring and the formation of a six-membered ring adjacent to another fivemembered ring. The elementary steps of the migration pathway are analyzed using density functional theory to examine the region of the potential energy surface associated with the pathway. The calculations are performed on a substrate modeled by the zigzag edge of tetracene.Based on the obtained energetics, the dynamics of the system are analyzed by solving the energy transfer master equations. The results indicate energetic and reaction-rate similarity between the cyclopenta combination and migration reactions. Also examined in the present study are desorption rates of migrating cyclopenta rings which are found to be comparable to cyclopenta ring migration.

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Measurement and numerical simulation of soot particle size distribution functions in a laminar premixed ethylene-oxygen-argon flame

Cited by 248 publications

References 30 publications

Development of High Fidelity Soot Aerosol Dynamics Models using Method of Moments with Interpolative Closure

Development of High Fidelity Soot Aerosol Dynamics Models using Method of Moments with Interpolative Closure

Croissance des HAP et des suies et transition phase gaz-phase solide dans les processus de combustion

Graphene layer growth: Collision of migrating five-member rings

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