Dataset for a combined experimental and CFD study of an ultra-clean ventilation system in an operating theatre (UK)

This dataset supports a combined experimental and computational fluid dynamics (CFD) study of an ultra-clean ventilation (UCV) system in a full-scale operating theatre in the United Kingdom, conducted in accordance with Health Technical Memorandum (HTM 03-01 Part A, 2021) commissioning procedures. The dataset is provided to enable reproducibility of the validation framework and to support further research into airflow performance and particle transport beneath UCV canopies. 1. Experimental Measurements Air velocity measurements were obtained beneath the UCV canopy at 1 m and 2 m above floor level, using an HTM-defined measurement grid aligned with the canopy footprint. For each measurement location, three independent datasets were collected under controlled commissioning conditions (doors closed, minimal disturbance), providing repeatability and allowing quantification of measurement variability. 2. Processed Experimental Data Processed datasets are provided to enable direct comparison with CFD predictions. These include: Mean velocity values at each measurement location (average of three repeats) Experimental range (max–min), defined as the difference between the maximum and minimum measured velocities across the three datasets Total uncertainty (envelope) used for error bars The uncertainty is calculated using the method defined in the associated study: The experimental half-span is computed as half of the range across repeated measurements A fixed instrumentation uncertainty (±0.015 m/s) is added to this half-span The resulting value defines the total uncertainty envelope for each measurement point This provides a conservative estimate of uncertainty consistent with the experimental methodology used for CFD validation. 3. Geometry for CFD Modelling The dataset includes the computational geometry of the operating theatre and UCV canopy system used in the CFD simulations. The geometry represents the full-scale physical configuration used during experimental testing and includes the operating theatre, canopy system, and associated airflow features required to reproduce the simulation domain and boundary conditions. Measurement Framework Measurement locations correspond to HTM-defined grid positions (e.g. rows A–J and probe lines such as 2A–2J), with spatial coordinates provided in metres relative to the canopy centreline. Velocity measurements are reported in m/s. Intended Use This dataset is intended for: Reproduction of the CFD validation presented in the associated study Benchmarking of airflow modelling approaches under HTM commissioning conditions Investigation of UCV airflow structure and experimental variability