Effects of Fences and Green Zones on the Air Flow and PM2.5 Concentration around a School in a Building-Congested District
نویسندگان
چکیده
We investigated the effects of wall- and tree-type fences on airflow fine particular matter (PM2.5) concentration around a school using computational fluid dynamics (CFD) model. First, we validated simulated wind speeds PM2.5 concentrations against measured values, results satisfied recommended criteria statistical validation indices used. Then, evaluated fence for 16 inflow directions by conducting numerical simulations with different types heights. With east–southeasterly inflow, relatively high from road was transported to school. However, wall-type prevented entering school, decreased significantly downwind fence. east–northeasterly horizontal speed due drag caused fence, resulting in shift flow convergence region. The region strengthened upward flow. This occurred because number pollutants background decreased. A comparison two revealed that effect inbound more significant, increased flows, than
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ژورنال
عنوان ژورنال: Applied sciences
سال: 2021
ISSN: ['2076-3417']
DOI: https://doi.org/10.3390/app11199216