2016
DOI: 10.1080/13647830.2016.1169319
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Understanding soot particle size evolution in laminar ethylene/air diffusion flames using novel soot coalescence models

Abstract: Two coalescence models based on different merging mechanisms are introduced. The effects of the soot coalescence process on soot particle diameter predictions are studied using a detailed sectional aerosol dynamic model. The models are applied to a laminar ethylene/air diffusion flame, and comparisons are made with experimental data to validate the models. The implementation of coalescence models significantly improves the agreement of prediction of particle diameters with the experimental data. Sensitivity of… Show more

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Cited by 33 publications
(16 citation statements)
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References 88 publications
(142 reference statements)
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“…Liquid-like incipient particles may coalesce. 14,16,113,[150][151][152][153][154] As these particles age, coalescence becomes impossible, and particles agglomerate instead of coalescing. Further aging is associated with graphitic surface growth that leads to the transition of agglomerates into aggregates.…”
Section: Chemical Evolutionmentioning
confidence: 99%
“…Liquid-like incipient particles may coalesce. 14,16,113,[150][151][152][153][154] As these particles age, coalescence becomes impossible, and particles agglomerate instead of coalescing. Further aging is associated with graphitic surface growth that leads to the transition of agglomerates into aggregates.…”
Section: Chemical Evolutionmentioning
confidence: 99%
“…Decreasing the surface reactivity normally leads to a decrease in the soot volume fraction as the HACA mechanism's contribution to surface growth decreases. Further adjustment of the surface reactivity, beyond what is already provided in literature [11,26] comes in when a new growth mechanism is introduced into the numerical model as is the case in the present study.…”
Section: Aliphatic Collision Mechanismmentioning
confidence: 86%
“…As per its definition, its value must be in the range of 0 to 1 as it is a fraction of the total number of sites. Moreover, it is either kept as a constant value [10,11,12] or more recently has been given a functional form [52,53,54] in many numerical models. The framework for the HACA mechanism and O2 driven oxidation rely on the theory of soot surface sites to function.…”
Section: Hydrogen-abstraction-carbon Addition and Oxidationmentioning
confidence: 99%
“…The opposite is normally true when the surface reactivity is increased. Further adjustment of the surface reactivity, beyond what is already provided in the literature [11,53] becomes relevant when a new growth mechanism is introduced into the numerical model. Since the surface reactivity parameter was tuned with a previous model, introducing a new mechanism may no longer produce realistic quantities of soot with the same value for surface reactivity.…”
Section: Model Descriptionmentioning
confidence: 99%