Small scale dispersion with obstacles

• Flow modelling including obstacles and topography (wind effect on built-up sites, micrositting for evaluating wind potential…),

• Small scale dispersion modelling, including obstacles, heavy or buoyant release, high momentum jet,

• Accurate modelling of fluid flow for different applications: study of wind effects on structures, micro sitting for evaluating the windborne potential ("OUTDOOR"), profiling of airflows in closed spaces ("INDOOR"),

• Simulating most physical atmospheric phenomena that occur at the local scale (taking into account the atmospheric boundary layer, the specific turbulence model, water microphysics, …),

• Calculating, for different types of sources (instantaneous or continuous; point, surface or volume), the dispersion of heavy or light gas pollutants, from various sources (vehicular traffic, industrial, hazard, etc.).

• Provides a complete CFD applied to atmospheric physics (tested, validated, conforming to Quality Assurance norms). It is particularly well adapted to process small scale atmospheric wastes and also has several types of turbulence closures,

• Has several pre and post processors,

• Offers cartesian or curvilinear coordinates ("terrain following") on structured or unstructured grids,

• Enables small scale stationary or transient calculations (from a few metres to a few km) by integrating the landforms and the buildings present on the site,

• Configures the water microphysics based on the KESSLER rule (condensation, re-evaporation, auto-conversion, capture),

• Facilitates the conducting of very diverse types of studies, like analysis of impact on air quality of new structures or of new urban settlements (peripheral, stadiums, streets...), studies for the defence sector (launch of missiles, definition of protection areas...) or interior air circulation analysis (ventilation in buildings...).

SGN AREVA; CNES CSG; GDF; AREVA; QUT ; Laboratoire d'Aéronomie CNRS (Jussieu) et le LMD (Rue d'ULM) ; Laboratoire de Mécanique des Fluides de l'Ecole Centrale de Lyon ; ENEA (Rome, homologue du CEA Italien) ; SGN (COGEMA) ; SAIC ; IRSN FONTENAY ; CEA CADARACHE ; DGA-CEB ; ITALECO ; CEREA (ENPC); CNRS ; AIRPARIF ; JANUS ; VILLE DE PARIS ; QUEENSLAND UNIVERSITY OF TECHNOLOGY (QUT, Laboratoire du ILAQH) ; GIVAUDAN - Genèves