Numerical Verification of the Effect of Side Wind on Fire of the Staircase of a Tall Building With Pyrosim Software

Document Type : Original Article

Authors

Fatemeh Behbahani ¹

Mahdi Hamzei ²

Zahra Mehrdoost ²

Mohammad Moghiman ³

¹ Department of Mechanical Engineering, Ahvaz, Iran

² Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

³ Department of Mechanical Engineering, Ferdowsi University, Mashhad, Iran

10.22067/jacsm.2024.81802.1178

Abstract

High-rise buildings are usually exposed to wind. Except for the chimney effect, smoke movement and fire behavior are strongly influenced by external wind forces. In this research, the effect of side wind was investigated numerically with Pyrosim software and using the Navirastox equations, energy, mass survival, fire and smoke distribution, and the large eddy simulation model was used for turbulence. For validation, the results were compared with Zhao et al.'s research. The side wind speed was considered between 0 and 1.2 m/s. The effect of side wind on smoke temperature was evaluated at different released heat. The released heat was considered in three modes of 300, 500 and 900 kW. In the case of constant released heat, the temperature should increase at first until it reaches a temperature peak, then the temperature decreases with the increase in wind speed. Also, with the increase in wind speed, the concentration of carbon monoxide increased by about 3%. The results showed that the side wind increases the risk of fire and should be considered in the design of buildings exposed to the wind.

Keywords

Smoke Movement

Fire Behavior

Side Wind

Pyrosim Software

Smoke Temperature

Subjects

• Combustion

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