trial graphics - arson investigation- flashover theory, coanda effect

http://www.tmba.tv/trial-graphics/arson-investigation/london-underground/ For more information call (212) 789-9077.

TMBA created these accident recreations based on the investigation report from the London Fire Brigade for the series "Extreme Evidence" (Court TV).

This animation illustrates the Coanda effect and flashover theory.

Flashover is a sudden widespread spreading of fire, which occurs when the majority of surfaces in a space are heated to the point at which they give off flammable gases hot enough to ignite themselves. Prior to flashover, flammable gases may be given off but are not hot enough to ignite themselves.
The trench effect occurs when a fire burns next to a steeply-inclined surface. The flames lie down along the surface, in accordance with the Coandă effect. The flames heat the material farther up: these emit gases, reach their auto-ignition temperature and then start burning, in accordance with flashover theory. The flames from these areas are themselves subject to the Coandă effect and blow a jet of flame up to the end of the inclined surface. This jet is sustained until the fuel is exhausted.

Please visit http://www.tmba.tv/trial-graphics/
to learn more about this investigations, and animation series.

Category:

Science & Technology

Tags:

• trial graphics
• fire dynamics
• accident recreation
• burn patterns
• flashover
• trench effect
• fire burn pattern
• fire pattern analysis