An aerosol is a set of solid, liquid or two-phase particles suspended in a gaseous medium. A particular feature of aerosols is the great variability in particle sizes, which can spread over several orders of magnitude (their dimensions vary between a few dozen micrometers and a few nanometers).
The physical phenomena that govern the movement of particles then depend on their size: for example, the effect of gravity on the smallest particles becomes negligible compared to air movements!
In this section dedicated to air quality, you will find:
- A brief description of an aerosol,
- A presentation of the physical properties that govern the aerosol dynamics.
- A description of a model developed to forecast air quality in subterranean train stations.