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Fire (Flash)
The result of ignition of a cloud of flammable vapor, when the flame velocity is too slow (laminar and subsonic) to produce an explosive shock wave. When a gas phase mixture of fuel an air is ignited, a flame front travels from the point of ignition in all directions where the fuel/air concentration is within flammable limits. The velocity of the flame front will determine the type of damage that will be caused by this event.