Light wind conditions are important in the assessment of risks from releases of hazardous gases, in the assessment of urban air quality, and also in the determination of ventilation requirements for buildings. Although very light winds would often prese
Airflow and thermal stratifications solutions in a single-zone building with buoyancy-driven ventilation are derived. Two new 'empty air-filling box' models are developed, and it is shown that the fully-mixed model overpredicts the clean zone height an