Wind Driven Cross-Flow Analysed as a Catchment Problem and as a Pressure Driven Flow

The wind approaching a building provided with openings has to make a choice; i.e. either to flow around the building or to flow through the openings. This selection procedure is dependent on both the external structure (shape) of the building and on its internal structure. In this paper the parameters controlling this selection procedure are explored. In order to clarify the basic process, simplified building models have been studied with a combination of wind tunnel studies, visualisation and CFD predictions.