BACKDRAFT : A deflagration resulting from the sudden introduction of air into a confined space containing oxygen deficient products of incomplete combustion
BI-DIRECTIONAL FLOW / NEUTRAL PLANE: Where smoke/hot gases (HIGHER PRESSURE) are exhausting out of the top of the vent opening and it is drawing a current of cooler/fresh air (LOWER PRESSURE) in through the bottom of the opening which creates a neutral plane.
CONDUCTION: The transfer of heat from the direct contact of a solid of higher temperature to a solid of lower temperature….
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Flame retardancy of polymers 