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Numerical modelling of microorganisms dispersion in urban area : application to legionella

Abstract : Dispersion modelling is often used to estimate potentially contaminated areas in case of accidental release of microorganisms in the atmosphere. In the specific case of Legionella, accidental spread in the atmosphere due to contaminated cooling towers system may occur over distance larger than 10km. In addition, most cooling towers are located in urban areas where dispersion due to obstacles is complex. In this case, dispersion models have to take into account complex flows and microphysical processes that occur within the plume and may have an impact on the survival of the microorganisms. To estimate the concentration of microorganisms in these areas, a specific module has been developed within the lagrangian dispersion model Micro Swift Spray (MSS, Aria technologies). This module takes into account microorganisms outside or inside water liquid droplets and microphysical interaction inside the plume. A simple biological module governing the survival of airborne microorganisms has also been implemented in the dispersion model.
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  • HAL Id : ineris-00973631, version 1
  • INERIS : EN-2011-334

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Frédéric Tognet, Cyrille Turmeau, Thi Lan Ha, Eric Tarnaud, Laurence Rouil, et al.. Numerical modelling of microorganisms dispersion in urban area : application to legionella. 14. International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes (HARMO 14), Oct 2011, Kos island, Greece. pp.746-750. ⟨ineris-00973631⟩

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