SOME THREE-DIMENSIONAL EFFECTS OF HEAT AND 
MASS TRANSFER IN A FIRE WITHIN A BUILDING
S. V. Puzach1 and V. G. Puzach2

UDC 614.841.4

Results of a numerical investigation of heat and mass 
transfer at the initial stage of a fire within a building in combustion 
of a liquid fire load, performed with the use of a three-dimensional 
mathematical field model, are presented. Formulas approximating the 
calculation results are proposed for estimation of the maximum time 
of operation of an opening to release the gas from the building and 
determination of the size of the zone within which a change in the 
position of the fire load causes no marked changes in the parameter 
of heat and mass transfer. Three-dimensional inhomogeneities in the 
temperature and velocity fields, which have a profound impact on the 
problem of providing fire safety for buildings, are revealed.

1Institute of High Temperatures, Russian Academy 
of Sciences, Moscow; 2Moscow Institute of Fire Safety, Moscow, 
Russia. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 74, No. 
1, pp. 35-40, January-February, 2001. Original article submitted 
December 7, 1999; revision submitted April 18, 2000.

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