fluidyn – PANAIR Fluidyn-PANAIR A Three-Dimensional tool to simulate Atmospheric Dispersion of Urban and Peri-Urban Pollution

Methodologies 3-D fluid dynamic software Air Quality of Urban areas Pollutant dispersion into the atmosphere Various weather conditions Assess the impact of any changes in the existing infrastructure Effects of pollution due to upcoming projects

Features Puff model for source identification Pre- and Post- Processor integrated with Solver Higher order numerical scheme for greater accuracy Manual mesh generator Multiple Sources and pollutants Transient emissions Fully interactive user friendly graphical interface Multi-windows interactive presentation Video animation

Features Estimation of concentration of Gas and Particle pollutants Simulation of pollutant dispersion in complex network of roads and building sites Natural convection in the urban canopy Impact analysis of site with respect to Air quality Visual representation of air quality for different weather situations

Informations Sources: GIS Files Monitoring Network Population data PRE-PROCESSOR Terrain Model Weather Data Emissions Inventory PROCESSOR Mesh Meteorological Processing Pollutants- Dispersion by Fluid dynamics Sub-models types: Heat Radiation Pollutant deposition Turbulence POST-PROCESSOR Wind Field Pollutants Mapping Concentrations Evolution Use: Urban Road Planning Air quality prediction Emission management

Topography Sub Options For Tracing/Modifying Terrain Objects Monitor Points Sub Options For Tracing/Modifying Terrain Objects Altitude curves Forest region Water Body

Chemical database List of Pollutants Properties of sulfur dioxide PANAIR

Emission Point Source To add,delete,modify, copy/move and to feed/show data for an added source Urban Areas

Weather data

Simulation options Additional simulation options To set simulation parameters To select models and start simulation Additional simulation options

Results Contours Grid Velocity Vectors XY Plot Surface Plot

Example : velocity fields

Example : altitude contours

Example : concentration contours

CASE STUDY – 4 “Urban Air Quality Modeling for CITY OF LYON”

Example : city of Lyon, France Meteorological Data: Hourly meteorological data extracted from the 15 minutes observations at four weather stations Emission Source: The fugitive emissions from anthropogenic activities, small scale industries and miscellaneous sources added. Stack emissions from large scale industries like Power Plants are considered separately as point sources.  

Example : city of Lyon, France

Example : city of Lyon, France Road network & vehicular count

Example : zoom on road network

Example : velocity vectors

Example : velocity vectors

Example : PM10 results

Example : SO2 results

Example : results in vertical plane

Example : isosurface results

Comparison with measures

Comparison with measures

LAM Example : city of Greenwich, UK

Example : city of Greenwich, UK The topographical features include altitude contours, green zones, road network and water bodies Terrain undulations from 10 m up to 100 m Size of the study domain : 22.7 Km (E-W direction) 17.36 Km (N-S direction) Surface of the domain : 390 km2 Height of the Domain : 650.0 m

Example : city of Greenwich, UK Topographical features and Computational Domain

Example : city of Greenwich, UK Data, recorded by London Weather Center Hourly meteorological data from 1989 to 1998 Wind rose data for 16 sectors

Example : city of Greenwich, UK

Example : city of Greenwich, UK 3544 Roads Data depending on traffic, car speed, % of heavy vehicles Industrial sources : 78 SO2, C6H6, CO, CO2, PM10, C3H8, CH4, Smoke, NMVOC, TSP and NOx,

Total Road Network on the Computational Domain Considered Example : city of Greenwich, UK Total Road Network on the Computational Domain Considered

3-D view of Computational domain with body fitted mesh Example : city of Greenwich, UK 3-D view of Computational domain with body fitted mesh

Example : altitude contours

Example : velocity vectors

Example : velocity vectors

Example : turbulence contours

Example : concentration contours

Example : zoom on a crossing

Example : zoom on a crossing

Example : zoom on a crossing

Example : zoom on a crossing Zoomed view of the mesh

Example : zoom on a crossing

Contours of concentrations Example : zoom on a crossing Contours of concentrations

Road impact (street scale) Example : zoom on a road Road impact (street scale)

FOR MORE INFORMATION…. http://www.fluidyn.com contact@fluidyn.com