Air Quality

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.