CFD simulation of atmospheric dispersion

Numerical simulation of atmospheric dispersion is used to study the propagation of gases, smoke or dust, and thus to assess the impact of any type of atmospheric pollution. The approach can be applied to a restricted area, known as the near-field, or to a particularly large region. Numerous phenomena can be modelled, such as the chronic or accidental aspect of emissions, or chemical interaction with the atmosphere. A CFD approach also makes it possible to take precise account of the topography and/or urban planning of the site, and the associated turbulent fluctuations.

This type of modelling has become commonplace in the context of air quality monitoring. The example below illustrates this with the modelling of near-field odour dispersion near a factory.