STUDY OF PARTICLE DISPERSION IN BUILDINGS WITH LARGE EDDY SIMULATION

摘要

To predict indoor pollutant level requires investigating the particle trajectories of the pollutants in buildings. This investigation used a large eddy simulation (LES) program, which solves large-scale flow motion and models subgrid-scale stresses, to predict three-dimensional and transient airflows in buildings and implemented a Lagrangian model in the LES program to simulate particle movement in a building. The program was validated with good accuracy by the experimental data of the dispersion of three different types of solid particles in a decaying homogeneous isotropic turbulent airflow. The program was further applied successfully to study particle dispersion in a six-room building.