The accurate estimation of pollutant dispersion has become of increasing concern to city planners and developers due to the expanding range of industrial activities taking place in and around population centres. Adequate ventilation in cities and around industrial areas has to be achieved to ensure that pollutants such as automobile exhaust gases and industrial by-product contaminants remain at acceptable levels. Detailed modelling of proposed developments and surrounding terrain is necessary to accurately determine pollutant concentrations. VIPAC offers both physical and computational modelling and provides design advice where necessary enabling maximum economic advantages.

Physical Modelling for "Near-Field" Dispersion Studies (up to 1km)
Wind tunnel studies of realistic model buildings are carried out at appropriate length scales with the accurate modelling of plume discharge momentum and atmospheric velocity to measure complex aerodynamic interference effects. By using a tracer gas and sensitive sampling equipment, concentrations of CO, NOx and SOx as well as dust particles can be determined.

Computational Modelling for "Far-Field" Dispersion Studies (10's of km)
VIPAC uses different numerical analysis software such as AUSPLUME, CALINE 4, MAXCON, RTDM and AIRPLAN, depending on the characteristics of the proposed development. These models can be used to ascertain atmospheric pollutant concentrations for different pollutant source strengths and locations with a range of meteorological data.

On-site monitoring validates physical and numerical models, helping to identify trouble spots and determine strategies to minimise the impact of pollution on the community.