NIST Time|NIST Home|About NIST|Contact NIST

HomeAll Years:AuthorKeywordTitle2005-2010:AuthorKeywordTitle

General Routine for Analysis of Stack Effect.


pdf icon 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.