Computerised method and system for modelling aeraulic flows, in particular for the quantitative assessment of the risk of airborne contamination

Disclosed is a computerized process and system for modeling aeraulic flows in an environment in particular for the evaluation of the risks of airborne contamination. The principle of the process consists in considering that in a given individual unit or mesh, defined as fairly small, the final values of the primitive variables (V, P, T) are the result of their primary values calculated in an irrotational field composed of a "pressure-velocity" coupling with a turbulence model adapted to Newtonian and incompressible fluids belonging to the range of validity of the process.