Tag: Dispersion assessment

CFD-Based Stack Height and Pollutant Dispersion Assessment for Design and Compliance Client: University of Derby Sector: Atmospheric Pollutant Dispersion Challenge As part of planned laboratory upgrades, the University of Derby required an assessment of the proposed fume stack configuration for B-Block. The upgrades included a significant increase in ventilation flow due to additional fume cupboards, raising concerns about whether the existing stack height would provide adequate dispersion of airborne pollutants. Key priorities included: Preventing re-ingestion of exhaust gases at nearby air intakes and windows Managing exposure risk for building users and pedestrians Demonstrating compliance with UK health-based exposure standards Solution Navier carried out a computational fluid dynamics (CFD) based atmospheric dispersion study to evaluate plume behaviour under a range of wind conditions. The simulation accounted for: Local building wake effects and site topography Buoyancy-driven dispersion and atmospheric boundary layer behaviour A range of wind directions informed by site-specific wind rose data To benchmark pollutant risk, a chemical survey was undertaken covering over 150 substances used within the laboratory. Based on hazard codes and evaporation...