Numerical simulation of thunderstorm downbursts on various urban morphologies
Urban structures are vulnerable to the various forces of nature and are regulated by stringent requirements to ensure their ability to withstand adverse weather conditions. One of the most severe weather conditions is the occurrence of thunderstorm downbursts, which are columns of cold air descendin...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2015
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| Online Access: | http://hdl.handle.net/10356/64926 |
| _version_ | 1824455907403104256 |
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| author | Lai, Wilson Weixian |
| author2 | Martin Skote |
| author_facet | Martin Skote Lai, Wilson Weixian |
| author_sort | Lai, Wilson Weixian |
| collection | NTU |
| description | Urban structures are vulnerable to the various forces of nature and are regulated by stringent requirements to ensure their ability to withstand adverse weather conditions. One of the most severe weather conditions is the occurrence of thunderstorm downbursts, which are columns of cold air descending very rapidly from a thunderstorm. When the air hits the ground, it radiates outwards, creating strong outflowing winds that can reach high velocities and are potentially damaging to urban structures. This project investigates the drag forces of microburst-like winds on different configurations of building layouts in urban environments. It attempts to identify the factors that affect the resultant drag forces and seeks to provide ways to alleviate the problems caused by these high intensity winds. Two studies were carried out using numerical analysis to examine the effects of various parameters on the resultant drag forces. The first study looked at the frontal and plan area indices, whereas the second study delved into the side street geometry. Both studies were conducted on the OpenFOAM platform using the k-ω SST turbulence model. |
| first_indexed | 2025-02-19T03:45:40Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/64926 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:45:40Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/649262023-03-04T18:16:34Z Numerical simulation of thunderstorm downbursts on various urban morphologies Lai, Wilson Weixian Martin Skote School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Fluid mechanics Urban structures are vulnerable to the various forces of nature and are regulated by stringent requirements to ensure their ability to withstand adverse weather conditions. One of the most severe weather conditions is the occurrence of thunderstorm downbursts, which are columns of cold air descending very rapidly from a thunderstorm. When the air hits the ground, it radiates outwards, creating strong outflowing winds that can reach high velocities and are potentially damaging to urban structures. This project investigates the drag forces of microburst-like winds on different configurations of building layouts in urban environments. It attempts to identify the factors that affect the resultant drag forces and seeks to provide ways to alleviate the problems caused by these high intensity winds. Two studies were carried out using numerical analysis to examine the effects of various parameters on the resultant drag forces. The first study looked at the frontal and plan area indices, whereas the second study delved into the side street geometry. Both studies were conducted on the OpenFOAM platform using the k-ω SST turbulence model. Bachelor of Engineering (Mechanical Engineering) 2015-06-09T06:36:38Z 2015-06-09T06:36:38Z 2015 Final Year Project (FYP) http://hdl.handle.net/10356/64926 en Nanyang Technological University 39 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Mechanical engineering::Fluid mechanics Lai, Wilson Weixian Numerical simulation of thunderstorm downbursts on various urban morphologies |
| title | Numerical simulation of thunderstorm downbursts on various urban morphologies |
| title_full | Numerical simulation of thunderstorm downbursts on various urban morphologies |
| title_fullStr | Numerical simulation of thunderstorm downbursts on various urban morphologies |
| title_full_unstemmed | Numerical simulation of thunderstorm downbursts on various urban morphologies |
| title_short | Numerical simulation of thunderstorm downbursts on various urban morphologies |
| title_sort | numerical simulation of thunderstorm downbursts on various urban morphologies |
| topic | DRNTU::Engineering::Mechanical engineering::Fluid mechanics |
| url | http://hdl.handle.net/10356/64926 |
| work_keys_str_mv | AT laiwilsonweixian numericalsimulationofthunderstormdownburstsonvariousurbanmorphologies |