Experimental and CFD analysis of particle distribution in a controlled test facility: Impact of exhalation flow velocity and direction (Experimental Dataset v1.1.0)

THE PUBLICATION This experimental dataset is complementary to the study by Qin et al., 2025, titled "Experimental and CFD analysis of particle distribution in a controlled test facility: Impact of exhalation flow velocity and direction": Link to full publication. The study systematically investigates how constant source conditions, specifically the exhalation flow velocity (EFV) and exhalation flow direction (EFD) at the source, affect the distribution of exhaled particles in a controlled test facility, combining full-scale measurements with CFD simulations. Velocity, temperature, and concentration fields obtained from CFD using the RNG k‑ε turbulence model were first validated against the experimental data provided here. The validated computational setup was subsequently used to examine two mixing ventilation configurations, three exhalation flow velocities (2.33, 4.65, and 9.30 m/s), three exhalation flow directions (positive y, negative y, and positive x), and a reference case with no exhalation flow at the source. THE DATA This repository contains the raw experimental data collected in the controlled test facility and used to validate the CFD model in the publication above. The dataset comprises measurements of air velocity, air temperature, and particle concentration recorded at the breathing level (z = 1.2 m) across the facility. For the results, analysis, and discussion, please refer to the publication Link to full publication, as this database only contains raw data. ACKNOWLEDGEMENTS This research received funding from the Pandemic Preparedness Programme and Ventilation (P3Venti Program) coordinated by The Netherlands Organization for Applied Scientific Research TNO and funded by the Dutch Ministry of Health, Welfare and Sport. The large experimental chamber is also partly financed by the collaboration project CLAIRE (LSHM22032), co-funded by the PPP Allowance made available by Health∼Holland, Top Sector Life Sciences & Health, to stimulate public-private partnerships (https://www.health-holland.com/), and by the NWO-MIST programme (MItigation STrategies for Airborne Infection Control; P20–35). The numerical part of this work was carried out on the Dutch national e-infrastructure with the support of SURF Cooperative (NWO-2021.027/L1). Dr.ir. Karin Kompatscher, Dr.ir. Philomena Bluyssen, and Ir. Robert Bezemer are acknowledged for their assistance with the measurements.