Smoke movement analysis in an inner corridor building with vents on the stairwell

Abstract

One inner corridor building was constructed by computational fluid dynamics (CFD) software and a series of CFD simulations were conducted in the building with/without a vent on the stairwell for different negative pressure differences induced by the surrounding wind. The result shows that the area affected by smoke is significantly decreased when the vent is set on the stairwell and the height of neutral plane increases significantly. However, it will increase the spread trend of smoke in low floors. The surrounding wind will produce negative pressure differences at the vent. For the high floors, with the increasing of negative pressure difference, the area affected by smoke is further reduced, but the degree of reduction is not obvious. For the low floors, the trend of smoke spread has not been alleviated with the increasing of negative pressure difference.