Calculation of collision frequency function for aerosol particles in free molecule regime in presence of force fields

Abstract

The collision frequency function for aerosol particles has already been calculated for the free molecule regime and for the continuum range. The present work, taking into account the influence of internal force fields such as magnetic force, electric force and molecular forces, created by particles themselves, recalculated the collision frequency in the case of particles much smaller than the mean free path of the gas (free molecule regime). Attractive forces increase naturally the collision frequency, while repulsive forces decrease it. The calculation was performed for all types of central forces deriving from a potential, including Coulomb forces and Van der Waals forces.

Keywords

aerosol particles / collision frequency function / coagulation

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 50476010).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg