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Wind and Structures Volume 8, Number 1, January 2005, pages 13-34 DOI: http://dx.doi.org/10.12989/was.2005.8.1.013 |
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Pressure and velocity fluctuations in the atmospheric oundary layer |
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M. Sterling, C. J. Baker, A. D. Quinn and R. P. Hoxey
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| Abstract | ||
| This paper presents an analysis of wind velocity and pressure data obtained in a rural environment with a view to identifying the vortex structures present within the flow and examining the relationship between pressure and dynamic pressure. The data is analysed using both conventional analysis and conditional sampling. A method examining the eigenvalues of a matrix formed by the addition of thernsquare of the strain tensor and the square of the vorticity tensor is also investigated. This method illustrates that there are a number of vortex structures present in the flow. The work presented in this paper suggests that the extreme events occur as a result of the superposition of two independent mechanisms. | ||
| Key Words | ||
| vortex; vorticity; flow structures; conditional sampling; pressure fluctuations. | ||
| Address | ||
| M. Sterling and C. J. Baker; School of Engineering, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, UKrnA. D. Quinn and R. P. Hoxey; Silsoe Research Institute, Wrest Park, Silsoe, Bedford, MK45 4HS, UK | ||