Characteristic analysis of H₂S gas diffusion flow field based on buildings layout

In order to study the distribution of H₂S gas diffusion flow field in different building layout, CFX computational fluid dynamics software was used to simulate the H₂S gas diffusion flow field under seven different building layout conditions in this paper. Furthermore, an example of verification was presented based on the building complex of a natural gas purification plant. The conclusions were listed as follows: (1) the stagnant area of gas velocity is closely related to the building layout, and the dead zone often occurs on the leeward side of the buildings while the air velocity would increase at the gap between the buildings; (2) the larger the width of the windward side of buildings is, the greater the stagnant area and area of leeward side of buildings are; (3) the CFX could be applied to simulate the air flow movement in complex building layout properly and provided a theoretical basis for the establishment of escape route after H₂S gas leakage accident.