Optimization of air purifier placement for mitigation of airborne contamination*

The best approach to avoid airborne contamination in confined space is (1) to clean the air and (2) to mask. This study focuses on air purification, an affordable mtigation method used with success gainast COVID and air pollution. Using state of the art large eddy simulation and a multi-objective optimization platform, we investigate the optimal placement of air purifiers in a modeled conference room and classroom. Emissions are either modeled as individual aerosols using Lagrangian transport, or concentration of contaminants using Eulerian transport equations. Realistic room turbulence is produced via natural convection and HVAC systems when applicable. The potential, limitations and uncertainties of the approach will be discussed as a tool to design solutions aiming at lowering the risk of contaminations in schools and common areas in the workplace.