Motion law of exhaled aerosol particle based on numerical simulation of large eddy model

Numerically simulates the aerosol particle diffusion produced by nasal breathing of seated women, considering different breathing patterns (continuous exhaling and intermittent breathing) and different ventilation conditions (ventilation and without ventilation). Compares and analyses the thermal plume, respiratory flow field and aerosol particle diffusion characteristics in different conditions. The results show that without ventilation, the motion laws of the aerosol particles of continuous exhaling is closed to that of intermittent breathing, but in the ventilation condition, the diffusion distance of the aerosol particles of intermittent breathing is longer, the maximum concentration of the aerosol particles of continuous exhaling is higher and the inhalation process in intermittent breathing mode sucks 7% to 11% of the total amount of aerosol particles. After a certain time of diffusion, the ventilation extends the maximum linear distance of the aerosol particles, but the aerosol particles can be removed by more than 25% in a short time.