Aerosol physics - Part 2

In this second part, we first look at aerosol coagulation, which, when sufficiently numerous, affects aerosol concentration and particle size. We then study their electrical properties, as applied in electrostatic selectors to obtain their granulometry. We then turn to their optical properties, which, for particles larger than 0.1 µm, can also be used in optical particle counters to determine their size distribution. Particular attention is paid to particle adhesion and re-entrainment. This is a field in which a number of applied research projects are underway (nuclear fuel reprocessing plants, bioaerosols in homes, industrial and hospital environments, ventilation duct cleaning). Finally, we conclude this overview of the physical properties of aerosols with a study of the condensation and evaporation of liquid aerosols, the results of which are applied in condensation nucleus counters that can detect down to nanoparticles.

The reader is referred to article [AF 3 612]: Physics of aerosols. Part 1 for the study of the mechanical properties of aerosols.