Numerical Simulation of Indoor Air Quality and Aerosol Diffusion in Gym

An indoor ventilation system plays an important role in the improvement of indoor air quality and the control of virus transmission. Therefore, based on Computational Fluid Dynamics (CFD), this paper establishes a full-scale gym ventilation calculation model under full-load conditions and simulates three different ventilation modes in the gym. The spatial distribution of indoor CO2 was obtained by solving the component transport equation, and the diffusion process of aerosol generated by the coughing of virus carriers in the gym was calculated by the Lagrange method. The results show that the CO2 con-centration in the indoor human activity area is lowest when the underfloor air distribution system is used. The top supply top return air and underfloor air distribution ventilation mode is more conducive to the removal of pollutants. The underfloor air distribution mode can minimize the mixing of air and aerosol particles in the gym and reduce the diffusion range of aerosol particles. The research results can provide a reference for the design of the ventilation system of the gym.