Study of particle movement in ventilation system

This paper presents the investigation results on a simulation program, which calculates the particle trajectory under different airflow patterns in the multi-zones structure building. The numerical simulation is first used to predict airflow pattern and ventilation performance. Then, the particle movement is determined by employing Lagrangian method. The simulation identifies the characteristics of ventilation and indoor air quality. The investigation results indicate that particle deposition and migration are mainly influenced by particle properties, ventilation conditions and airflow patterns. Smaller particles have greater potential effect on indoor air quality than larger particles.