A CFD Study of Roadside Barrier Impact on the Dispersion of Road Air Pollution
This study evaluated road shape and roadside barrier impact on near-road air pollution dispersion using FLUENT computational fluid dynamics (CFD) model. Simulated road shapes are three types, namely at-grade, depressed, and filled road. The realizable k-ε model in FLUENT CFD code was used to simulat...
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| Format: | Article |
| Language: | English |
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Springer
2015-03-01
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| Series: | Asian Journal of Atmospheric Environment |
| Subjects: | |
| Online Access: | http://asianjae.org/_common/do.php?a=full&b=11&bidx=1540&aidx=19504 |
| _version_ | 1797765581449986048 |
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| author | Sang Jin Jeong |
| author_facet | Sang Jin Jeong |
| author_sort | Sang Jin Jeong |
| collection | DOAJ |
| description | This study evaluated road shape and roadside barrier impact on near-road air pollution dispersion using FLUENT computational fluid dynamics (CFD) model. Simulated road shapes are three types, namely at-grade, depressed, and filled road. The realizable k-ε model in FLUENT CFD code was used to simulate the flow and dispersion around road. The selected concentration profile results were compared with the wind tunnel experiments. The overall concentration profile results show good agreement with the wind tunnel results. The results showed that noise barriers, which positioned around the at-grade road, decrease the horizontal impact distance (In this study, the impact distance was defined as the distance from road surface origin coordinate to the position whose mass fraction is 0.1.) lower 0.33~0.65 times and change the vertical air pollution impact distance larger 2.0~2.27 times than those of no barrier case. In case of filled road, noise barriers decrease the horizontal impact distance lower 0.24~0.65 times and change the vertical air pollution impact distance larger 3.33~3.55 times than those of no barrier case. The depressed road increase 1.53~1.68 times the vertical air pollution impact distance. It contributes the decrease of horizontal air pollution impact distance 0.32~0.60 times compare with no barrier case. |
| first_indexed | 2024-03-12T20:12:09Z |
| format | Article |
| id | doaj.art-efea8a969a7b4ba1895fe0967a6ca7d2 |
| institution | Directory Open Access Journal |
| issn | 1976-6912 2287-1160 |
| language | English |
| last_indexed | 2024-03-12T20:12:09Z |
| publishDate | 2015-03-01 |
| publisher | Springer |
| record_format | Article |
| series | Asian Journal of Atmospheric Environment |
| spelling | doaj.art-efea8a969a7b4ba1895fe0967a6ca7d22023-08-02T01:40:51ZengSpringerAsian Journal of Atmospheric Environment1976-69122287-11602015-03-0191223010.5572/ajae.2015.9.1.022A CFD Study of Roadside Barrier Impact on the Dispersion of Road Air PollutionSang Jin Jeong0Department of Energy and Environmental Engineering, Kyonggi University, Suwon, Gyeonggi-do 442-760, KoreaThis study evaluated road shape and roadside barrier impact on near-road air pollution dispersion using FLUENT computational fluid dynamics (CFD) model. Simulated road shapes are three types, namely at-grade, depressed, and filled road. The realizable k-ε model in FLUENT CFD code was used to simulate the flow and dispersion around road. The selected concentration profile results were compared with the wind tunnel experiments. The overall concentration profile results show good agreement with the wind tunnel results. The results showed that noise barriers, which positioned around the at-grade road, decrease the horizontal impact distance (In this study, the impact distance was defined as the distance from road surface origin coordinate to the position whose mass fraction is 0.1.) lower 0.33~0.65 times and change the vertical air pollution impact distance larger 2.0~2.27 times than those of no barrier case. In case of filled road, noise barriers decrease the horizontal impact distance lower 0.24~0.65 times and change the vertical air pollution impact distance larger 3.33~3.55 times than those of no barrier case. The depressed road increase 1.53~1.68 times the vertical air pollution impact distance. It contributes the decrease of horizontal air pollution impact distance 0.32~0.60 times compare with no barrier case.http://asianjae.org/_common/do.php?a=full&b=11&bidx=1540&aidx=19504cfd modelroad shapenoise barrierroad emissionair pollution dispersion |
| spellingShingle | Sang Jin Jeong A CFD Study of Roadside Barrier Impact on the Dispersion of Road Air Pollution Asian Journal of Atmospheric Environment cfd model road shape noise barrier road emission air pollution dispersion |
| title | A CFD Study of Roadside Barrier Impact on the Dispersion of Road Air Pollution |
| title_full | A CFD Study of Roadside Barrier Impact on the Dispersion of Road Air Pollution |
| title_fullStr | A CFD Study of Roadside Barrier Impact on the Dispersion of Road Air Pollution |
| title_full_unstemmed | A CFD Study of Roadside Barrier Impact on the Dispersion of Road Air Pollution |
| title_short | A CFD Study of Roadside Barrier Impact on the Dispersion of Road Air Pollution |
| title_sort | cfd study of roadside barrier impact on the dispersion of road air pollution |
| topic | cfd model road shape noise barrier road emission air pollution dispersion |
| url | http://asianjae.org/_common/do.php?a=full&b=11&bidx=1540&aidx=19504 |
| work_keys_str_mv | AT sangjinjeong acfdstudyofroadsidebarrierimpactonthedispersionofroadairpollution AT sangjinjeong cfdstudyofroadsidebarrierimpactonthedispersionofroadairpollution |