Numerical simulation of pressure changes in closed chamber fires

Wan Ki Chow, G. W. Zou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

Pressure rising in closed chamber fires will be studied numerically in this paper with Computational Fluid Dynamics (CFD). The Fire Dynamics Simulator (FDS) developed at the National Institute of Standards and Technology (NIST) in USA is taken as the simulation tool. Experiments on closed chamber fires were reported in the literature by the Defence Research Establishment (FoA) in Sweden. Scenarios similar to those in that experimental study were taken as examples for simulation. Air flow pattern, pressure and temperature distribution are predicted. Functional analysis is used to compare predicted values with experiments. This gives some indication on how good CFD can be when applied for studying closed chamber fires. It is observed that input heat release rate to FDS is a key point. Predicted results on air velocities, temperature and pressure agree reasonably well with experimental results. Care should be taken in applying the fast reaction mixture fraction combustion model for simulating under-ventilated fires.
Original languageEnglish
Pages (from-to)1261-1275
Number of pages15
JournalBuilding and Environment
Volume44
Issue number6
DOIs
Publication statusPublished - 1 Jun 2009
Externally publishedYes

Keywords

  • CFD fire model
  • Closed chamber fire
  • Fire safety
  • Room air pressure

ASJC Scopus subject areas

  • Environmental Engineering
  • Geography, Planning and Development
  • Civil and Structural Engineering
  • Building and Construction

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