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Overview of a Theory for Simulating Smoke Movement Through Long Vertical Shafts in Zone-Type Fire Models.


pdf icon Overview of a Theory for Simulating Smoke Movement Through Long Vertical Shafts in Zone-Type Fire Models. (164 K)
Cooper, L. Y.

NISTIR 5499; September 1994.

National Institute of Standards and Technology. Annual Conference on Fire Research: Book of Abstracts. October 17-20, 1994, Gaithersburg, MD, 93-94 pp, 1994.
Order number: PB95-104964

Keywords:

fire research; smoke movement; zone models; fire models; compartment fires

Abstract:

A limitation of the two-layer quasi-steady-buoyant-plumes approach to modeling compartment fires. The modeling strategy which uses the concepts of one-to-two uniform layers per room, room-to-room mass exchanges by vent flows, and layer-to-layer mass exchange by quasi-steady buoyant plumes has proven to be very robust. However, there are important practical room configurations and associated fire scenarios where these basic concepts are inadequate. If the basic concepts are not applicable to a particular room configuration, then, to the extent that room plays a significant role in the spread of fire and smoke throughout the facility (e.g., the room is the connecting flow path between the room of fire origin and a threatened space), the inadequacy of the simulation in that room can render inadequate the entire simulation.