Airflow around buildings can be predicted using Fluent's CFD software. The transport of pollutants from exhaust stacks or vents, under postulated wind conditions, can be analyzed to help decide where to place ventilation intakes on the building exterior.

Flow pathlines illustrate the vulnerability of a building ventilation intake to pollutants from stack exhaust.

Pathlines shown as the camera moves around and zooms in and out		Pathlines on a succession of horizontal planes
Velocity vectors on a succession of planes		The spread of a plume from a smoke stack

Building Air Intake and Exhaust Design: Plumes from Stacks in a City Block