Influence of thermal effects to pollutant dispersion in idealized street canyon: numerical study
In this work, we numerically investigate the process of atmospheric air pollution at various values of the road temperature in idealized urban canyons. To solve this problem, the Reynolds-averaged Navier-Stokes equations (RANS) were used. Closing this system of equations required the use of various...
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| Format: | Article |
| Language: | English |
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Al-Farabi Kazakh National University
2022-03-01
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| Series: | Вестник КазНУ. Серия математика, механика, информатика |
| Subjects: | |
| Online Access: | https://bm.kaznu.kz/index.php/kaznu/article/view/991/654 |
| _version_ | 1797937204583989248 |
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| author | A. Issakhov T. Yang Perizat Omarova |
| author_facet | A. Issakhov T. Yang Perizat Omarova |
| author_sort | A. Issakhov |
| collection | DOAJ |
| description | In this work, we numerically investigate the process of atmospheric air pollution at various values of the road temperature in idealized urban canyons. To solve this problem, the Reynolds-averaged Navier-Stokes equations (RANS) were used. Closing this system of equations required the use of various turbulent models. The verification of the mathematical model and the numerical algorithm was carried out using a test problem. The results obtained using various turbulent models were compared with experimental data and calculated data of other authors. The main problem considered in this paper is characterized as follows: estimation of emissions of pollutants between buildings using different types of hedge barriers (continuous and intermittent) at different temperatures. The results have shown that the presence of hedge barriers along the roads significantly reduces the concentration of harmful substances in the air. The use of a grass barriers with a total height of 0.1H leads to a decrease in the concentration level to a section X = 0.05H by more than 1.5 times compared with the case of a complete absence of protective barriers. In addition, the temperature conditions (in this case, TH = 305K) also reduce the concentration value by almost 2 times. Increasing the temperature at the side of the road using the barrier reduces the spread and deposition of pollutants |
| first_indexed | 2024-04-10T18:41:01Z |
| format | Article |
| id | doaj.art-b73654aaae994c549fabe304ec414c58 |
| institution | Directory Open Access Journal |
| issn | 1563-0277 2617-4871 |
| language | English |
| last_indexed | 2024-04-10T18:41:01Z |
| publishDate | 2022-03-01 |
| publisher | Al-Farabi Kazakh National University |
| record_format | Article |
| series | Вестник КазНУ. Серия математика, механика, информатика |
| spelling | doaj.art-b73654aaae994c549fabe304ec414c582023-02-01T13:40:26ZengAl-Farabi Kazakh National UniversityВестник КазНУ. Серия математика, механика, информатика1563-02772617-48712022-03-011131124135https://doi.org/10.26577/JMMCS.2022.v113.i1.13Influence of thermal effects to pollutant dispersion in idealized street canyon: numerical studyA. IssakhovT. YangPerizat Omarova0AL-Farabi Kazakh national university, Kazakhstan, AlmatyIn this work, we numerically investigate the process of atmospheric air pollution at various values of the road temperature in idealized urban canyons. To solve this problem, the Reynolds-averaged Navier-Stokes equations (RANS) were used. Closing this system of equations required the use of various turbulent models. The verification of the mathematical model and the numerical algorithm was carried out using a test problem. The results obtained using various turbulent models were compared with experimental data and calculated data of other authors. The main problem considered in this paper is characterized as follows: estimation of emissions of pollutants between buildings using different types of hedge barriers (continuous and intermittent) at different temperatures. The results have shown that the presence of hedge barriers along the roads significantly reduces the concentration of harmful substances in the air. The use of a grass barriers with a total height of 0.1H leads to a decrease in the concentration level to a section X = 0.05H by more than 1.5 times compared with the case of a complete absence of protective barriers. In addition, the temperature conditions (in this case, TH = 305K) also reduce the concentration value by almost 2 times. Increasing the temperature at the side of the road using the barrier reduces the spread and deposition of pollutantshttps://bm.kaznu.kz/index.php/kaznu/article/view/991/654air pollutionransmathematical modelhedge barriersconcentrationtemperature |
| spellingShingle | A. Issakhov T. Yang Perizat Omarova Influence of thermal effects to pollutant dispersion in idealized street canyon: numerical study Вестник КазНУ. Серия математика, механика, информатика air pollution rans mathematical model hedge barriers concentration temperature |
| title | Influence of thermal effects to pollutant dispersion in idealized street canyon: numerical study |
| title_full | Influence of thermal effects to pollutant dispersion in idealized street canyon: numerical study |
| title_fullStr | Influence of thermal effects to pollutant dispersion in idealized street canyon: numerical study |
| title_full_unstemmed | Influence of thermal effects to pollutant dispersion in idealized street canyon: numerical study |
| title_short | Influence of thermal effects to pollutant dispersion in idealized street canyon: numerical study |
| title_sort | influence of thermal effects to pollutant dispersion in idealized street canyon numerical study |
| topic | air pollution rans mathematical model hedge barriers concentration temperature |
| url | https://bm.kaznu.kz/index.php/kaznu/article/view/991/654 |
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