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...

Full description

Saved in:
Bibliographic Details
Main Author: Lai, Wilson Weixian
Other Authors: Martin Skote
Format: Final Year Project
Language:English
Published: 2015
Subjects:
Online Access:http://hdl.handle.net/10356/64926
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-64926
record_format dspace
spelling sg-ntu-dr.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
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering::Fluid mechanics
spellingShingle DRNTU::Engineering::Mechanical engineering::Fluid mechanics
Lai, Wilson Weixian
Numerical simulation of thunderstorm downbursts on various urban morphologies
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.
author2 Martin Skote
author_facet Martin Skote
Lai, Wilson Weixian
format Final Year Project
author Lai, Wilson Weixian
author_sort Lai, Wilson Weixian
title Numerical simulation of thunderstorm downbursts on various urban morphologies
title_short 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_sort numerical simulation of thunderstorm downbursts on various urban morphologies
publishDate 2015
url http://hdl.handle.net/10356/64926
_version_ 1759858163756040192