# Predicting HCl concentrations in fire enclosures using an HCl decay model coupled to a CFD-based fire field model

Wang, Zhaozhi, Jia, Fuchen, Galea, Edwin R., Patel, Mayur and Ewer, John (2007) *Predicting HCl concentrations in fire enclosures using an HCl decay model coupled to a CFD-based fire field model.* Fire and Materials, 31 (7). pp. 443-461. ISSN 0308-0501 (doi:10.1002/fam.942)

## Abstract

The amount of atmospheric hydrogen chloride (HCl) within fire enclosures produced from the combustion of chloride-based materials tends to decay as the fire effluent is transported through the enclosure due to mixing with fresh air and absorption by solids. This paper describes an HCl decay model, typically used in zone models, which has been modified and applied to a computational fluid dynamics (CFD)-based fire field model. While the modified model still makes use of some empirical formulations to represent the deposition mechanisms, these have been reduced from the original three to two through the use of the CFD framework. Furthermore, the effect of HCl flow to the wall surfaces on the time to reach equilibrium between HCl in the boundary layer and on wall surfaces is addressed by the modified model. Simulation results using the modified HCl decay model are compared with data from three experiments. The model is found to be able to reproduce the experimental trends and the predicted HCl levels are in good agreement with measured values

Item Type: | Article |
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Uncontrolled Keywords: | hydrogen chloride, deposition, compartment fires, fire simulation, CFD |

Subjects: | Q Science > QA Mathematics > QA75 Electronic computers. Computer science |

School / Department / Research Groups: | School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis School of Computing & Mathematical Sciences School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Mechanics & Reliability Group School of Computing & Mathematical Sciences > Department of Mathematical Sciences School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Fire Safety Engineering Group School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Science & Engineering Group |

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Last Modified: | 31 Mar 2011 18:20 |

URI: | http://gala.gre.ac.uk/id/eprint/1116 |

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