Video Footage of Flow Visualization Tests

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Demonstration of wind separation at leading edge of building roof and creation of rooftop re-circulation region.	Exhaust discharge from stack is trapped in rooftop re-circulation region.	Taller stack shows improved dispersion - almost out of influence of rooftop re-circulation region.
Demonstration of the wind re-circulation region created behind a building (leeward side).	Example of Dispersion from Rooftop Stack	Exhaust from stack on lower roof impacting elevated receptors on adjacent building.
Wind is directed down between 2 adjacent buildings of similar height.	Wind behaviour around buildings - infill situation.