Numerical Investigation of Intensity of Rising Flow of Hot Gases

Abstract

The motion of the burning gases that constitute the flame during fires is particularly intriguing from two perspectives: its impact on the stability of building structures and the process of extinguishing the fire, as well as the prevention of its further spread. This study investigates the existing zones within the flame during fires and their distinctive features. The upward movement of burning gases closely resembles that of a convective jet but occurs at significantly higher temperatures. The temperature and velocity distribution along the flame axis were investigated depending on the power of the fire. The changes in the density and velocity head along the height of the flame are presented graphically. These results can be very helpful for multi-store building with the aim to prevent floor heating due to the higher temperature of the attic of the down enclosure and to take measure for its cooling.

Keywords

• fire
• power of fire
• buildings