Simulation of pollution dispersion behind a building using a RANS-LES model
Today the air pollution is one of the biggest problem specially in mega cities and it effects directly on human health and environment. in this article pollution dispersion for the light gas pollutant around a building in turbulent 3D incompressible flow using a hybrid turbulence model has been inve...
| Main Authors: | , |
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| Format: | Article |
| Language: | fas |
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Semnan University
2017-08-01
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| Series: | مجله مدل سازی در مهندسی |
| Subjects: | |
| Online Access: | https://modelling.semnan.ac.ir/article_2532_35977cb32b06c7a35f8e0e568d807d77.pdf |
| _version_ | 1827342440769519616 |
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| author | ghassem heidarinejad amir mohammad jadidi |
| author_facet | ghassem heidarinejad amir mohammad jadidi |
| author_sort | ghassem heidarinejad |
| collection | DOAJ |
| description | Today the air pollution is one of the biggest problem specially in mega cities and it effects directly on human health and environment. in this article pollution dispersion for the light gas pollutant around a building in turbulent 3D incompressible flow using a hybrid turbulence model has been investigated. Pollution around a building in low speed wind may aggregate in some regions and make special problems for pedestrian and environment. Turbulent wind flow over buildings due to the complexity like sharp corners, ground effect, different vortexes and other factors is one of the best choices to evaluate efficiency and accuracy of turbulence methods. DES is hybrid RANS-LES models for simulating turbulent flow which for their characteristic, treat near wall as RANS and farther the wall act as LES model. Consequently computational time will decrease compared to traditional LES models. To evaluate DES model, DES results has been compared with smagorinsky and one-equation model. Also to validate, the simulation results are compared with experimental data. The DES results show good agreement with experiment and LES models and this hybrid model has a good potential for large scale wind engineering problems. |
| first_indexed | 2024-03-07T22:07:34Z |
| format | Article |
| id | doaj.art-cdcf3d1685e34c7a833b682ebe089d8f |
| institution | Directory Open Access Journal |
| issn | 2008-4854 2783-2538 |
| language | fas |
| last_indexed | 2024-03-07T22:07:34Z |
| publishDate | 2017-08-01 |
| publisher | Semnan University |
| record_format | Article |
| series | مجله مدل سازی در مهندسی |
| spelling | doaj.art-cdcf3d1685e34c7a833b682ebe089d8f2024-02-23T19:03:17ZfasSemnan Universityمجله مدل سازی در مهندسی2008-48542783-25382017-08-011549172710.22075/jme.2017.25322532Simulation of pollution dispersion behind a building using a RANS-LES modelghassem heidarinejad0amir mohammad jadidi1دانشگاه تربیت مدرسtarbiatmodares universityToday the air pollution is one of the biggest problem specially in mega cities and it effects directly on human health and environment. in this article pollution dispersion for the light gas pollutant around a building in turbulent 3D incompressible flow using a hybrid turbulence model has been investigated. Pollution around a building in low speed wind may aggregate in some regions and make special problems for pedestrian and environment. Turbulent wind flow over buildings due to the complexity like sharp corners, ground effect, different vortexes and other factors is one of the best choices to evaluate efficiency and accuracy of turbulence methods. DES is hybrid RANS-LES models for simulating turbulent flow which for their characteristic, treat near wall as RANS and farther the wall act as LES model. Consequently computational time will decrease compared to traditional LES models. To evaluate DES model, DES results has been compared with smagorinsky and one-equation model. Also to validate, the simulation results are compared with experimental data. The DES results show good agreement with experiment and LES models and this hybrid model has a good potential for large scale wind engineering problems.https://modelling.semnan.ac.ir/article_2532_35977cb32b06c7a35f8e0e568d807d77.pdfgas pollutantcomputer simulationhybrid turbulence modeldes modelbuildingturbulencemass transfer |
| spellingShingle | ghassem heidarinejad amir mohammad jadidi Simulation of pollution dispersion behind a building using a RANS-LES model مجله مدل سازی در مهندسی gas pollutant computer simulation hybrid turbulence model des model building turbulence mass transfer |
| title | Simulation of pollution dispersion behind a building using a RANS-LES model |
| title_full | Simulation of pollution dispersion behind a building using a RANS-LES model |
| title_fullStr | Simulation of pollution dispersion behind a building using a RANS-LES model |
| title_full_unstemmed | Simulation of pollution dispersion behind a building using a RANS-LES model |
| title_short | Simulation of pollution dispersion behind a building using a RANS-LES model |
| title_sort | simulation of pollution dispersion behind a building using a rans les model |
| topic | gas pollutant computer simulation hybrid turbulence model des model building turbulence mass transfer |
| url | https://modelling.semnan.ac.ir/article_2532_35977cb32b06c7a35f8e0e568d807d77.pdf |
| work_keys_str_mv | AT ghassemheidarinejad simulationofpollutiondispersionbehindabuildingusingaranslesmodel AT amirmohammadjadidi simulationofpollutiondispersionbehindabuildingusingaranslesmodel |