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Wind and Structures
  Volume 8, Number 1, January 2005, pages 13-34

Pressure and velocity fluctuations in the atmospheric oundary layer
M. Sterling, C. J. Baker, A. D. Quinn and R. P. Hoxey

    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.
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

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