Viewpoints on wind and air infiltration phenomena at buildings illustrated by field and model studies

The locations of stagnation points on the church model were determined using particle image velocimetry measurements. Multiple stagnation points occurred. The forces exerted on the church model by winds were measured using a load cell. The projected areas affected by winds in various directions were calculated using a CAD model of the church. A fairly large region of influence on the ground, caused by blockage of the wind, was revealed by testing the scale model in the wind tunnel and recording the static pressure on the ground at many points. The findings of this study are summarized as a number of steps that we suggest to be taken to improve the analysis of wind driven flow in buildings and with these suggestions as a basis for further improvement of prediction methods for wind-driven flows.