General Routine for Analysis of Stack Effect.
General Routine for Analysis of Stack Effect.
(1019 K)
Klote, J. H.
NISTIR 4588; 33 p. July 1991.
Sponsor:
General Services Administration, Washington, DC
Available from:
National Technical Information Service
Order number: PB91-231589
Keywords:
stack effect; building fires; computer models;
mathematical models; smoke movement
Abstract:
Stack effect is a major driving force of smoke movement
in buildings. This paper presents a general method for
evaluation of the location of the neutral plane for a
space connected to its surroundings by any number of
openings. A computer program, STACK, for analysis of
the location of the neutral plane and resulting flows is
presented along with example analyses. The examples show
that the location of the neutral plane between a space
and its surroundings is a weak function of temperature
and a strong function of the size of openings. Further,
the mass flow rate leaving a space due to stack effect
is a strong funciton of temperature.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899