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Aerosol nucleation and growth in a turbulent jet using the Stochastic Fields method

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journal contribution
posted on 07.12.2012, 11:19 by Andrew GarmoryAndrew Garmory, E. Mastorakos
The Stochastic Fields transported PDF method for turbulent reacting flows has been used to model the nucleation and growth of dibutyl phthalate particles in a hot, turbulent jet in a colder background for which experimental data is available. The aerosol population is modelled using an assumed log-normal size distribution. It has been found that neglecting the effect of turbulent fluctuations leads to the peak particle concentration being predicted too close to the jet and the concentration downstream underpredicted. However, this effect was small compared to that of adjusting modelled surface tension. Only by adjusting this was it possible to reproduce correctly the downstream evolution of particle number found in experiment. Particle mass mean diameter was significantly underpredicted at the centre of the jet, which may be due to the inability of log-normal size distribution to capture the distribution in detail. Taking account of turbulent fluctuations leads to increased mean particle size at the edge of the plume. The extent of this increase is strongly dependent on the choice of micromixing timescale.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Citation

GARMORY, A. and MASTORAKOS, E., 2008. Aerosol nucleation and growth in a turbulent jet using the Stochastic Fields method. Chemical Engineering Science, 63 (16), pp. 4078 - 4089.

Publisher

© Elsevier Ltd.

Version

AM (Accepted Manuscript)

Publication date

2008

Notes

This article was published in the journal, Chemical Engineering Science [© Elsevier Ltd.] and the definitive version is available at: http://dx.doi.org/10.1016/j.ces.2008.05.012

ISSN

0009-2509

Language

en