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CFD modelling of a hospital ward: Assessing risk from bacteria produced from respiratory and activity sources

Hathway, A., Noakes, C.J. and Sleigh, P.A. (2008) CFD modelling of a hospital ward: Assessing risk from bacteria produced from respiratory and activity sources. In: Indoor Air 2008 : The 11th International Conference on Indoor Air Quality and Climate. Indoor Air 2008, 17-22nd August 2008, Copenhagen, Denmark. , Copenhagen .

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Abstract

It has been identified that potentially pathogenic acteria, such as MRSA can be released from the skin during routine activities within hospital wards, such as bed-making, washing patients, dressing and walking. CFD is often used to study airflow patterns and ventilation regimes within hospitals, however such models tend not to consider these types of dispersal mechanisms and concentrate on respiratory transmission, using a point source at the mouth position. A zonal source is demonstrated to represent this release from activity within CFD simulations using both passive scalar and Lagrangian particle tracking. Sensitivity studies are carried out for point and zonal sources. The point source was found to not adequately represent the release of bacteria from a zone and therefore the zonal source is recommended to be used in conjunction with this type of source in order to simulate both respiratory and activity sources of bacteria.

Item Type: Proceedings Paper
Keywords: Bio-aerosol, CFD, Hospitals, Source definition, Health-care associated infection
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds)
The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds) > Inst for Pathogen Control Engineering (Leeds)
Depositing User: Ms Caroline Wilson
Date Deposited: 11 Feb 2009 10:20
Last Modified: 04 Jun 2014 22:12
Published Version: http://www.indoorair2008.org/
Status: Published
URI: http://eprints.whiterose.ac.uk/id/eprint/7704

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