Numerical simulations on aerodynamics of thermally induced plumes

J. Li, Wan Ki Chow

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Since the physics of air entrainment is not yet clearly understood, most of the fire plume expressions reported in the literature were derived empirically. Experiments with different fire geometry, fuels, and ambient conditions would be difficult when trying to derive comprehensive plume temperature and velocity fields from existing theories. Computational fluid dynamics (CFD), a practical engineering tool in fire engineering, might give a better understanding of the plume behavior. This technique can eliminate factors which are difficult to control in experiments, but would affect the plume movement. Aerodynamics for thermally induced plumes is studied by CFD in this article. Three types of thermal plumes such as axisymmetric plume, balcony spill plume, and door plume are considered. Four axisymmetric plume equations and three balcony spill plume models are assessed by comparing with the CFD results. For door plumes, qualitative results of the mass entrainment rate are obtained. Investigations in this article are useful for fire engineers in designing smoke management systems in an affordable fashion. This is a critical point in implementing an engineering performance-based fire code.
Original languageEnglish
Pages (from-to)119-160
Number of pages42
JournalJournal of Fire Sciences
Volume25
Issue number2
DOIs
Publication statusPublished - 1 Mar 2007

Keywords

  • Computational fluid dynamics
  • Fire
  • Numerical simulation
  • Thermally induced plumes

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials
  • Mechanical Engineering

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