Alan Robins Hong Chang Phil Hancock

1
Dispersion of Air Pollution and Penetration into
the Local Environment
Alan Robins Hong Chang Phil Hancock
2
Wind Tunnel Activities

• Field study simulations
• Field site modelling sensitivity studies
• Generic studies
• Wind turbulence field mapping
• Dispersion measurements for point line sources
• Flux fluctuation measurements
• Data set generation for model evaluation

3
Preparatory Work - I
Boundary layer simulation - devices and scale at
1200 - street-side buildings typically 100
-200mm tall
Surface roughness? Coarse and detailed
models Level of detail? 5mm ? 1m 2mm ? 0.4m
4
Preparatory Work - II
Model construction maps plans, 3 levels of
detail Needed for computational and wind tunnel
studies common format suppliers?
5
Field Site
6
(No Transcript)
7
Infoterra Data
Co-ordinates of roof corners, plus maximum spot
height
500m diameter
8
Infoterra Data with Overlay
Interpretation of digital data - by eye and time
consuming