Smoke layer formation by fires in forced-ventilation enclosure

Yoshihiko Hayashi*, Yuji Hasemi, Alexander Ptchelintsev

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


Gas analysis and temperature measurement using a room with controllable heat sources reveal the condition of smoke layer formation in fires in forced-ventilation and highly airtight enclosures. Three combinations were used. 1) An inlet opening located in a lower part and an outlet at an upper level, 2) both an inlet and an outlet located on the ceiling, 3) An inlet at the upper level and an outlet at the lower. Methane combustion lasted for longer than 30 minutes in the first case with an air supply rate of 50m3/h and a heat release rate of l00kW. In the other configurations, combustion lasted for much less than 30 minutes, and there was hardly any smoke layer formation. The stability of the smoke layer was also affected by the inlet air velocity. The mechanism of the smoke layer destruction due to increased inlet velocity was also investigated using CFD results.

Original languageEnglish
Title of host publicationFire Safety Science - Proceedings of the 6th International Symposium
PublisherInternational Association for Fire Safety Science
Number of pages12
ISBN (Print)0925223255, 9780925223258
Publication statusPublished - 2000
Event6th International Symposium on Fire Safety Science - Poitiers, France
Duration: 1999 Jul 51999 Jul 9

Publication series

NameFire Safety Science
ISSN (Print)1817-4299


Conference6th International Symposium on Fire Safety Science


  • Computational fluid dynamics
  • Enclosure fires
  • Forced-ventilation
  • Smoke layer

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Building and Construction


Dive into the research topics of 'Smoke layer formation by fires in forced-ventilation enclosure'. Together they form a unique fingerprint.

Cite this