Numerical investigation of the influence of topography on simulated downburst wind fields

Mason, Matthew S., Wood, Graeme S. and Fletcher, David F. (2010) Numerical investigation of the influence of topography on simulated downburst wind fields. Journal of Wind Engineering and Industrial Aerodynamics, 98 1: 21-33. doi:10.1016/j.jweia.2009.08.011


Author Mason, Matthew S.
Wood, Graeme S.
Fletcher, David F.
Title Numerical investigation of the influence of topography on simulated downburst wind fields
Journal name Journal of Wind Engineering and Industrial Aerodynamics   Check publisher's open access policy
ISSN 0167-6105
1872-8197
Publication date 2010-01
Sub-type Article (original research)
DOI 10.1016/j.jweia.2009.08.011
Open Access Status Not Open Access
Volume 98
Issue 1
Start page 21
End page 33
Total pages 13
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract A, dry, non-hydrostatic sub-cloud model is used to simulate an isolated stationary downburst wind event to study the influence topographic features have on the near-ground wind structure of these storms. It was generally found that storm maximum wind speeds could be increased by up to 30% because of the presence of a topographic feature at the location of maximum wind speeds. Comparing predicted velocity profile amplification with that of a steady flow impinging jet, similar results were found despite the simplifications made in the impinging jet model. Comparison of these amplification profiles with those found in the simulated boundary layer winds reveal reductions of up to 30% in the downburst cases. Downburst and boundary layer amplification profiles were shown to become more similar as the topographic feature height was reduced with respect to the outflow depth.
Keyword Downburst
Microburst
Thunderstorm
Thunderstorm outflow
Topography
Hill
Escarpment
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
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Created: Fri, 05 Feb 2016, 11:45:45 EST by Jeannette Watson on behalf of School of Civil Engineering