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    Development of a numerical model to simulate the biological inactivation of airborne microorganisms in the presence of ultraviolet light.

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    Publication date
    2004
    Author
    Noakes, C.J.
    Fletcher, L.A.
    Beggs, Clive B.
    Sleigh, P.A.
    Kerr, Kevin G.
    Keyword
    Bacteria
    Pseudomonadales
    Pseudomonadaceae
    Infection
    Bacteriosis
    Mycobacterial infection
    Pseudomonas aeruginosa
    Tuberculosis
    Microorganism
    Inactivation
    Peer-Reviewed
    Yes
    
    Metadata
    Show full item record
    Abstract
    The effectiveness of any ultraviolet germicidal irradiation (UVGI) system is governed by the passage of airborne microorganisms through the UV field. This paper describes a new method for evaluating the performance of UVGI devices using computational fluid dynamic (CFD) simulations. A microorganism inactivation equation is combined with a scalar transport equation to describe the concentration of airborne microorganisms in the presence of a UV field. The solution of this equation, in conjunction with the momentum and turbulent energy equations, allows the effect of both the airflow and the UV field on the microorganism distribution to be examined. Solutions are shown for the airflow and microorganism concentration through a bench scale flow apparatus, at five different UV intensities. The results from the CFD model are validated against the experimental data, obtained from the flow apparatus, for aerosolised Pseudomonas aeruginosa microorganisms. Good comparisons are seen, giving confidence in the application of the technique to other situations.
    URI
    http://hdl.handle.net/10454/3491
    Version
    No full-text available in the repository
    Citation
    Noakes, C.J., Fletcher, L.A., Beggs, C.B. and Sleigh, P.A. et al. (2004). Development of a numerical model to simulate the biological inactivation of airborne microorganisms in the presence of ultraviolet light. Journal of Aerosol Science. Vol. 35, No. 4, pp. 489-507.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.jaerosci.2003.10.011
    Type
    Article
    Collections
    Engineering and Informatics Publications

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