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Oka Lab
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A lab that studies the flow of heat and smoke from fires.
AboutAbout the lab
Studying how heat and smoke flow in fires
Oka Lab studies the flow of heat and smoke when a fire occurs.
Its listed research areas are analysis and assessment of fire hazards, fire cause investigation, combustion behavior of combustible materials, and prediction of fire detection and activation times.
In addition to studying how smoke spreads inside tunnels, the lab has also investigated the properties of hot gas flows that spread beneath ceilings.
The lab also studies fatigue among firefighters during firefighting operations.
Key terms
- Fire plume
- A rising flow of gas heated by a fire
- Smoke layer
- A layer formed when fire smoke accumulates near the ceiling
- Ceiling jet
- A flow in which a rising hot gas plume hits the ceiling and spreads horizontally beneath it
NewsLab news
View More ↗ResearchResearch themes
This lab studies how the heat and smoke produced by fires flow. Its research also covers fire detection, prediction of activation times, and fatigue among firefighters during firefighting operations.
*Illustrative imageSmoke spread in tunnel fires
The lab is refining and validating a model that predicts how a smoke layer spreads longitudinally when a fire occurs in a tunnel. It also examines the vertical distributions of temperature and wind speed.
*Illustrative imageFatigue of firefighters during firefighting operations
Fatigue of firefighters during firefighting operations is one of the lab's research themes. The lab has also worked on a prototype system that manages safety based on cardiopulmonary load, as well as on developing measuring instruments.
*Illustrative imageProperties of fire plumes and ceiling jets
The lab has studied ceiling jets, the flows that spread when a fire plume hits a ceiling, beneath both horizontal and sloped ceilings. The fundamental characteristics of compartment fires and the prediction of ceiling jets have been summarized in a review article.
MembersFaculty
- ProfessorYasushi Oka
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “TunnelFire -TomStoryPIO” Coconino NF Photography / Public domain (cropped)
- Smoke spread in tunnel fires: “Smoke from Tunnel Five Fire as seen from Angel's Rest on July 4, 2023” Mattsjc / CC BY-SA 4.0 (cropped)
- Fatigue of firefighters during firefighting operations: “Defense.gov News Photo 120723-F-HA794-089 - A U.S. Air Force firefighter sprays water at the fire of a simulated C-130 Hercules plane crash during operational readiness exercise Beverly” Staff Sgt. Craig Cisek, U.S. Air Force / Public domain (cropped)
- Properties of fire plumes and ceiling jets: “Adams Fire Smoke Plume 2024 01” US Government / Public domain (cropped)
- Related lab (Shibutani Lab): “US Navy 091014-N-3038W-676 The aviation intermediate maintenance department jet shop performs a jet engine test cell on a F404-GE-400 jet engine for a F-A-18C” U.S. Navy photo by Mass Communication Specialist 3rd Class John Phillip Wagner Jr. / Public domain (cropped)
- Related lab (Advanced Environmental Measurement Chemistry Lab): “Isotope Ratio Mass Spectrometer ( )” IAEA Imagebank / CC BY 2.0 (cropped)
- Related lab (Nakamura Lab): “Reverse osmosis desalination plant” James Grellier / CC BY-SA 3.0 (cropped)
- Related lab (Regenerative Medicine (Junji Fukuda) Lab): “YPD petri dishes” Ns takes photos / CC BY 4.0 (cropped)
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