How Outdoor Trees Affect Indoor Particulate Matter Dispersion
CFD Simulations in a Naturally Ventilated Auditorium
Bibliographic Data
| ID | 15480872 |
|---|---|
| Authors | Bo Hong (0000-0002-8585-1909, Northwest A&F University, corresponding author), Hongqiao Qin (0000-0001-7478-1311, Northwest A&F University), Runsheng Jiang (0009-0001-1636-199X, Northwest A&F University), Min Xu (0000-0002-8940-1614, Northwest A&F University), Jiaqi Niu (0000-0003-2983-671X, Northwest A&F University) |
| Year | 2018 |
| Volume | 15 |
| Issue | 12 |
| Pages | 2862-2862 |
| Publication date | 2018-12-14 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | International Journal of Environmental Research and Public Health (JOURNAL) |
| Journal identifiers | ISSN: 1661-7827 • E-ISSN: 1660-4601 |
| Publisher | Multidisciplinary Digital Publishing Institute (PUBLISHER • CH) |
| DOI | 10.3390/ijerph15122862 |
| PMID | 30558174 |
| OpenAlex | W2905266323 |
| Language | EN |
| Citations received | 1 |
| References cited | 79 |
This study used computational fluid dynamics (CFD) models, coupling with a standard k-ε model based on the Reynolds-averaged Navier-Stokes (RANS) approach and a revised generalized drift flux model, to investigate effects of outdoor trees on indoor PM 1.0 , PM 2.5 , and PM 10 dispersion in a naturally ventilated auditorium. Crown volume coverage ( CVC ) was introduced to quantify outdoor trees. Simulations were performed on various CVCs , oncoming wind velocities and window opening sizes (wall porosities were 3.5 and 7.0%, respectively, for half and fully opened windows). The results were as follows: (1) A vortex formed inside the auditorium in the baseline scenario, and the airflow recirculation created a well-mixed zone with little variation in particle concentrations. There was a noticeable decrease in indoor PM 10 with the increasing distance from the inlet boundary due to turbulent diffusion. (2) Assuming that pollution sources were diluted through the inlet, average indoor particle concentrations rose exponentially with increasing oncoming wind speed. PM 10 changed most significantly due to turbulent diffusion and surface deposition reduction intensified by the increased wind velocity. (3) Increasing the window opening improved indoor cross-ventilation, thus reducing indoor particle concentrations. (4) When 2.87 m3/m2 ≤ CVC ≤ 4.73 m3/m2, indoor PM 2.5 could meet requirements of the World Health Organization's air quality guidelines (IT-3) for 24-hour mean concentrations; and (5) average indoor particle concentrations had positive correlations with natural ventilation rates ( R 2 = 0.9085, 0.961, 0.9683 for PM 1.0 , PM 2.5 , and PM 10 , respectively, when the wall porosity was 3.5%; R 2 = 0.9158, 0.9734, 0.976 for PM 1.0 , PM 2.5 , and PM 10 , respectively, when the wall porosity was 7.0%)
Affect (linguistics · Biology · Computational fluid dynamics · Dispersion (optics · Mechanics · Optics · Particulates · Physics · Air Quality and Health Impacts · Environmental Science · Noise Effects and Management · Psychology · Wind and Air Flow Studies · Ecology
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| Unique citing works | 1 |
|---|---|
| Citations per year | 0,13 |
| Citation span | 2018 - 2018 (1) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 1 |