Studies on smoke movement in stairwell induced by an adjacent compartment fire

X. Q. Sun, L. H. Hu, Y. Z. Li, R. Huo, Wan Ki Chow, Nai Kong Fong, Che Heng Gigi Lui, K. Y. Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

38 Citations (Scopus)


Experiments were conducted to investigate the smoke movement in a full-scale six-storey stairwell induced by a fire in an adjacent compartment. The smoke flow pattern in the stairwell was observed with vertical temperature and velocity field distribution measured. Corresponding Computational Fluid Dynamics (CFD) simulations were carried out by Fire Dynamics Simulator (FDS) and compared with the measured data. It was observed that the smoke flow moved upward in circular patterns and formed vortices under the stairwell tread of each storey. The smoke temperature was found to generally decrease exponentially with height in the stairwell, except the top and the bottom levels, where the temperature is relatively higher. The upward smoke flow velocity first increased and then decreased with height. The predicted smoke flow temperature and velocity by FDS were shown to agree well with the measured values. Temperature distribution is identified to be a key factor affecting the smoke movement in the stairwell.
Original languageEnglish
Pages (from-to)2757-2765
Number of pages9
JournalApplied Thermal Engineering
Issue number13
Publication statusPublished - 1 Sept 2009
Externally publishedYes


  • Fire-induced flow
  • Smoke flow
  • Stairwell
  • Vortices

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering


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