Abstract：
Standard κ-ε model and discrete phase model(DPM)were used in the simulation of movement and distribution of residential indoor PM2.5 with different window open modes under the condition of the natural ventilation. The window open modes contain casement windows,top-hung window and bottom-hinged window. The results showed that on the premise of air quality outdoor better than indoor,under the condition of casement windows, indoor flow distribution is steady and the average concentration of indoor particulate matter is the lowest among all the simulated conditions; under the condition of top-hung window, the window shape gives an upward guidance on airflow, results in decrease of fresh air volume in the lower personnel activity area. Particulate matter piled up,so the indoor particulate matter concentration on average is the highest among all the operation conditions; under the condition of bottom-hinged window, the indoor particulate matter concentration on average is between the top-hung window condition and the bottom-hinged window condition.
