SOME REGULARITIES OF HEAT AND MASS TRANSFER IN THE CASE OF FIRE WITHIN A BUILDING
S. V. Puzach and V. M. Kazennov UDC 614.841.4 Results of a numerical investigation of heat and mass transfer at the initial stage of fire within a building in combustion of kerosene, carried out with the use of a three-dimensional mathematical field model, are presented. A comparison of the distribution of the averaged temperatures and velocities along the vertical axis of the convective column and of the mass rates of gas flows through an open opening with the experimental data has been made. Substantial three-dimensional inhomogeneities of the velocities and the temperatures in the near-ceiling layer have been revealed. It has been established that near the opening there is a critical separation zone which influences significantly the parameters of natural gas transfer. Academy of State Fire-Prevention Service, Moscow, Russia; email: puzachsv@hotmail.com. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 75, No. 5, pp. 130-137, September-October, 2002. Original article submitted January 15, 2002; revision submitted April 9, 2002. JEPTER7492020028 JEPTER749208