부산대학교 도서관

Results of calculating the dynamics of descent of the lower boundary of the near-ceiling gas layer in a model atrium using various zone approaches and a field model are presented. Comparison with experimental data is made. It is shown that when a zone mathematical model is used it is necessary to take account of the shape of the convective column formed above the source of combustion. It is pointed out that the application of the approximation of an unrestricted buoyant plume to describing parameters of the convective column does not reflect the actual thermodynamic picture of the fire development (primarily the effect of the atrium ceiling) and can lead to both an understatement and an overstatement of the fire danger of atria. [ABSTRACT FROM AUTHOR]