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