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Thermal Radiation Modelling in Tunnel Fires

Published online by Cambridge University Press:  03 June 2015

Paolo Ciambelli ,
Maria Grazia Meo ,
Paola Russo  and
Salvatore Vaccaro
Paolo Ciambelli*
Affiliation:
Department of Industrial Engineering, University of Salerno, via Ponte don Melillo 84084 Fisciano (SA), Italy
Maria Grazia Meo*
Affiliation:
Department of Industrial Engineering, University of Salerno, via Ponte don Melillo 84084 Fisciano (SA), Italy
Paola Russo*
Affiliation:
Department of Industrial Engineering, University of Salerno, via Ponte don Melillo 84084 Fisciano (SA), Italy
Salvatore Vaccaro*
Affiliation:
Department of Industrial Engineering, University of Salerno, via Ponte don Melillo 84084 Fisciano (SA), Italy
*
Email: [email protected]
Email: [email protected]
Corresponding author. URL: www.diin.unisa.it Email: [email protected]
Email: [email protected]
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Abstract

Modelling based on Computational Fluid Dynamics (CFD) is by now effectively used in fire research and hazard analysis. Depending on the scenario, radiative heat transfer can play a very important role in enclosure combustion events such as tunnel fires. In this work, the importance of radiation and the effect of the use of different approaches to account for it were assessed. Firstly, small-scale tunnel fire simulations were performed and the results compared with experimental data, then realistic full-scale scenarios were simulated. The results show up the capability of CFD modelling to reproduce with good approximation tunnel fires. Radiation proved to be noteworthy mainly when the scale of the fire is relatively large. Among the various approaches employed to simulate radiation, the use of the Discrete Transfer model gave the most accurate results, mainly when the absorption-emission characteristics of the combustion products were taken into account. Finally, the suitability of the use of CFD in quantitative Fire Hazard Analysis is discussed.

Keywords

68U20CFDradiation modellingfire hazard analysistunnel fires
Type
Research Article
Information
Advances in Applied Mathematics and Mechanics , Volume 3 , Issue 3 , June 2011 , pp. 327 - 353
Copyright
Copyright © Global-Science Press 2011

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