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

2. 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

3. 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

4. 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

5. 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

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

7. Chemical database List of Pollutants Properties of sulfur dioxide
PANAIR

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

9. Weather data

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

11. Results
Contours
Grid
Velocity Vectors
XY Plot
Surface Plot

12. Example : velocity fields

13. Example : altitude contours

14. Example : concentration contours

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

16. 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.

17. Example : city of Lyon, France

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

19. Example : zoom on road network

20. Example : velocity vectors

21. Example : velocity vectors

22. Example : PM10 results

23. Example : SO2 results

24. Example : results in vertical plane

25. Example : isosurface results

26. Comparison with measures

27. Comparison with measures

28. LAM
Example : city of Greenwich, UK

29. 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 : m

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

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

32. Example : city of Greenwich, UK

33. 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,

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

35. 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

36. Example : altitude contours

37. Example : velocity vectors

38. Example : velocity vectors

39. Example : turbulence contours

40. Example : concentration contours

41. Example : zoom on a crossing

42. Example : zoom on a crossing

43. Example : zoom on a crossing

44. Example : zoom on a crossing
Zoomed view of the mesh

45. Example : zoom on a crossing

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

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

48. FOR MORE INFORMATION….