A sectional model is used to simulate the internal/external mixing of atmospheric aerosol particles by coagulation. The model consists initially in two externally mixed particle types made of pure substances A and B which collide to form a third population of internally mixed particles that contains all externally mixed components. For testing purposes, an exact solution is developed that gives the total number concentration of each type of particles for a constant coagulation kernel. Good agreement is found between the predicted and the exact total number concentrations. The model is then applied to simulate the evolution of a plume with mixing between soot and hygroscopic particles. Optical and hygroscopic properties are calculated for all types of particles to bring out their sensitivity to particle composition, size and mixture type.
|Number of pages||8|
|Publication status||Published - 1 Dec 1996|
|Event||Proceedings of the 1996 4th International Conference on Air Pollution, Air Pollution 96 - Toulouse, Fr|
Duration: 28 Aug 1996 → 30 Aug 1996
|Other||Proceedings of the 1996 4th International Conference on Air Pollution, Air Pollution 96|
|Period||28/8/96 → 30/8/96|
ASJC Scopus subject areas