Large scale Lagrangian particle tracking for investigating airborne dispersion of pathogens in generic seminar room settings

Kurzfassung

3D Lagrangian particle tracking and distributed temperature sensors are used in order to determine the volumetric transport of small aerosol particles in mixed turbulent convection under well-defined boundary conditions in more realistic scenarios. Therefore, a ~70 m³ test class room with optical access for a set of 8 emergent GMAX 65 Mpx streaming cameras and a large array of pulsed LEDs for the pulsed illumination of submillimeter HFSBs has been established at DLR Göttingen. A seminar room type configuration with 8 seated full-scale heated dummies at tables including a teacher and a mechanical lung have been chosen. The aim of these experiments is to provide a quantitative visualization of the Lagrangian transport properties following up to ~3 million HFSB trajectories per time-step and of the associated turbulent flow field using Shake-The-Box Lagrangian particle tracking and subsequent FlowFit3 data assimilation inside a ~55 m³ subvolume of the generic class room.