Technical Report 37, c4e-Preprint Series, Cambridge

Numerical simulations of soot aggregation in premixed laminar flames

ref: Technical Report 37, c4e-Preprint Series, Cambridge

Authors: Neal M. Morgan, Markus Kraft, Michael Balthasar, David Wong, Michael Frenklach, and Pablo Mitchell

Associated Theme: Nanoparticles

Abstract

In this paper we make use of a detailed particle model and stochastic numerical methods to simulate the particle size distributions of soot particles formed in laminar premixed flames. The model is able to capture evolution of mass and surface area along with the full structural detail of the particles. The model is validated against previous models for consistency and then used to simulate flames with bimodal and unimodal soot particle distributions. The change in morphology between the particles from these two types of flames provides further evidence of the interlay among nucleation, coagulation, and surface rates. The results confirm the previously proposed role of the strength of the particle nucleation source in defining the instant of transition from coalescent to fractal growth of soot particles.

Material from this preprint has been published in: Proceedings of the Combustion Institute 31 (1), 693-700, (2007)

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