Abstract
Tear gas is a widespread non-lethal weapon, but there is very little research on its non-lethal effectiveness at different scales of space, environment, and wind speed, which leads to no scientific guidance on the number of tear gas canisters to be used in practical applications. The effect of tear gas smoke released in different space sizes, environmental conditions, and obstacles was studied in this paper using fluent software. The results show that different spaces, media, and obstacles have different effects on smoke diffusion. Tear gas canisters in different spaces show that both are spread outward in the form of point sources. The smoke spreads outward on sunny days and spreads at a higher height on cloudy days. It has a particular guiding significance for tear gas canisters in practical applications.
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