Technical Report 123, c4e-Preprint Series, Cambridge
The suitability of particle models in capturing aggregate structure and polydispersity
ref: Technical Report 123, c4e-Preprint Series, Cambridge
Associated Theme: Nanoparticles
This work presents the mathematical formulation of particle models commonly used in aerosol dynamics of nanoparticles. A detailed numerical study is conducted in order to understand under which conditions these models differ. The silica model of Shekar et al. (2012, J. Aerosol Sci. 44 83-98) and silicon model of Menz et al. (2013, Combustion & Flame, accepted for publication) model taken from the literature are analysed using three different particle models, demonstrating that substantial errors can be incurred when using a particle model inappropriate for a particular modelling application. It is concluded that the suitability of a particular particle model for a modelling purpose is dependent on the characteristic sintering and coagulation timescales of the system. The influence of particle rounding due to heterogeneous surface growth remains to be quantified.
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