Brownian coagulation of aerosols in transition regime

Abstract

The collision efficiency of Brownian coagulation for monodisperse aerosol par-ticles in the transition regime is considered. A new expression for collision effi-ciency is proposed taking into account the influence of tangential relative motion when two particles get close enough during the diffusion process. The breakaway point from which the theory of near continuum regime no longer applies can thus be obtained easily. A comparison with experimental measurements shows the ac-curacy of the results predicted by the new theory.