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Smoke Movement in a Corridor: Hybrid Model, Simple Model and Comparison With Experiments.


pdf icon Smoke Movement in a Corridor: Hybrid Model, Simple Model and Comparison With Experiments. (1620 K)
Matsushita, T.; Klote, J. H.

NISTIR 4982; 51 p. December 1992.

Available from:

National Technical Information Service
Order number: PB93-146678

Keywords:

corridors; smoke movement; comparison; heat transfer; large scale fire tests

Abstract:

A hybrid model for modeling smoke movement in a corridor is described. This model uses a new approach for determining the corridor smoke flow. The hybrid model is a two zone model which considers velocities in each zone, and uses a fine mesh to the direction of propagation. Two different approaches to deal with the pressure term are addressed. Full scale and reduced scale experiments are described and compared with the results of the hybrid model. Since heat transfer is not presently incorporated in the hybrid model, the simulated velocity of spread is constant. But in the experiment, the velocity drops with advancing time. A simple model with heat transfer is also described. This model is similar to the density flow model, and assumes that the movement of the smoke front (nose) is similar to the flow through vertical openings in a zone model. Results of the simple model are compared with the experiment with heat transfer, and the effect of the heat transfer coefficient is observed.