A simplified model to estimate COVID19 transport in enclosed spaces
Journal of Physics: Conference Series, Volume 2069
AbstractAirborne pathogen respiratory droplets are the primary route of COVID19 transmission, which are released from infected people. The strength and amplitude of a release mechanism strongly depend on the source mode, including respiration, speech, sneeze, and cough. This study aims to develop a simplified model for evaluation of spreading range (length) in sneeze and cough modes using the results of Eulerian-Lagrangian CFD model. The Eulerian computational framework is first validated with experimental data, and then a high-fidelity Lagrangian CFD model is employed to monitor various scale particles' trajectory, evaporation, and lingering persistency. A series of Eulerian-Lagrangian CFD simulations is conducted to generate a database of bioaerosol release spectrum for the release modes in various thermal conditions of an enclosed space. Eventually, a correlation fitted over the data to offer a simplified airborne pathogen spread model. The simplified model can be applied as a source model for design and decision-making about ventilation systems, occupancy thresholds, and disease transmission risks in enclosed spaces.
Mirzaei , P A , Moshfeghi , M , Motamedi , H , Sheikhnejad , Y & Bordbar , H 2021 , ' A simplified model to estimate COVID19 transport in enclosed spaces ' , Journal of Physics: Conference Series , vol. 2069 , no. 1 , 012191 . https://doi.org/10.1088/1742-6596/2069/1/012191