With the frequent outbreak of influenza virus in urban areas, the ecological security of high-density housing is becoming increasingly prominent. An Eulerian-Lagrangian pollutant diffusion model based on Large Eddy Simulation (LES) is established to simulate the transport of airborne virus. After the reliability of the numerical model is validated by the indoor experiment, the indoor and outdoor dispersion of microbial aerosol are simulated. The exposure risk is further studied based on the space-time concentration of pathogenic microorganisms of numerical simulation. The outcome can provide evidences for building plan optimization, environmental risk analysis and safety withdrawal planning.
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