- Author
- Tsujimoto, M.
- Title
- Smoke Movement as a Density Current.
- Coporate
- Nagoya Univ., Japan
- Report
- NBSIR 85-3118,
- Distribution
- Available from National Technical Information Service
- Book or Conf
- National Bureau of Standards. 7th Joint Panel Meeting of the UJNR Panel on Fire Research and Safety. October 24-28, 1983, Gaithersburg, MD, 273-292 p., ['1983', '1985']
- Keywords
- smoke density
- Abstract
- It is evident that the driving force of smoke movement is the heat generated by combustion in the fire room. But it is not clear what kind of flow the heat makes after blowing out from the fire room. Considering corridors and staircases as a sort of stream tubes, the smoke movement in the buildings must be classified into two large groups, a pipe flow and an open channel flow. It is considered that the expansion as a result of excess heating in a fire room produces the pressure gradient and forms the pipe flow, while the buoyancy of smoke itself forms an open channel flow below the ceiling.