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Validation of FDS for the prediction of medium-scale pool fires

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Wen, Jennifer X., Kang, K., Donchev, T. and Karwatzki, J. M. (2007) Validation of FDS for the prediction of medium-scale pool fires. Fire Safety Journal, Volume 42 (Number 2). pp. 127-138. doi:10.1016/j.firesaf.2006.08.007

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Official URL: http://dx.doi.org/10.1016/j.firesaf.2006.08.007

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Abstract

Fire dynamics simulator (FDS) has been applied to simulate a medium-scale methanol pool fire. The simulation used predominantly the existing features in FDS except that an additional sub-grid-scale combustion model based on the laminar flamelet approach of Cook AW and Riley JJ [Combust and Flame 1998;112:593–606] was used alongside the default mixture fraction combustion model for comparison. The predictions of the two different combustion models for temperature and axial velocity distributions were found to be in reasonably good agreement with each other and the experimental data. The pulsating nature of air entrainment was demonstrated by the air entrainment velocity fluctuations and the instantaneous velocity vectors, which revealed formation and shedding of vortices and the well-known “neck-in” at a distance of approximately one diameter from the pool surface. The predicted variations of air entrainment at different heights agreed well with some published data and correlation. Although the limitation of the code in predicting the puffing frequency was noticed as the spectra of temperature fluctuations failed to demonstrate any dominant frequency, the present study has demonstrated the capability of FDS to deliver reliable predictions on most important parameters of pool fires.

Item Type: Journal Article
Divisions: Faculty of Science > Engineering
Journal or Publication Title: Fire Safety Journal
Publisher: Pergamon
ISSN: 0379-7112
Official Date: 2007
Dates:
DateEvent
2007Published
Volume: Volume 42
Number: Number 2
Page Range: pp. 127-138
DOI: 10.1016/j.firesaf.2006.08.007
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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