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Mean and fluctuating wind loads on rough and smooth domes


Letchford, CW and Sarkar, PP, Mean and fluctuating wind loads on rough and smooth domes, Journal of Wind Engineering & Industrial Aerodynamics, 88, (1) pp. 101-117. ISSN 0167-6105 (2000) [Refereed Article]

DOI: doi:10.1016/S0167-6105(00)00030-1


Simultaneous pressure measurements have been obtained on rough and smooth parabolic domes in simulated atmospheric boundary layer flow. Mean and fluctuating pressure distributions compare favorably with earlier studies for similar shape and Reynolds number. The effect of surface roughness is to reduce suctions over the apex of the dome and increase suctions in the wake region on the leeward face. The consequence for mean and fluctuating overall loads is reduced uplift but increased drag for rougher surfaces. Correlation analysis of the fluctuating pressures reveals that the first two eigenvectors account for approximately 60% of the fluctuating pressure energy and follow the mean pressure coefficient and its gradient with respect to horizontal wind direction as predicted by the quasi-steady theory. Overall base shear and uplift forces on the domes can be well approximated by this theory. (C) 2000 Elsevier Science Ltd. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Engineering
Research Group:Fluid mechanics and thermal engineering
Research Field:Turbulent flows
Objective Division:Construction
Objective Group:Construction planning
Objective Field:Civil construction planning
UTAS Author:Letchford, CW (Professor Chris Letchford)
ID Code:47449
Year Published:2000
Web of Science® Times Cited:26
Deposited By:Engineering
Deposited On:2007-09-15
Last Modified:2007-09-15

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