Journal article

Vertical Coherence of Turbulence in the Atmospheric Surface Layer: Connecting the Hypotheses of Townsend and Davenport

Dominik Krug, Woutijn J Baars, Nicholas Hutchins, Ivan Marusic

Boundary-Layer Meteorology | Springer (part of Springer Nature) | Published : 2019


Statistical descriptions of coherent flow motions in the atmospheric boundary layer have many applications in the wind engineering community. For instance, the dynamical characteristics of large-scale motions in wall turbulence play an important role in predicting the dynamical loads on buildings, or the fluctuations in the power distribution across wind farms. Davenport (Quarterly Journal of the Royal Meteorological Society, 1961, Vol. 372, 194-211) performed a seminal study on the subject and proposed a hypothesis that is still widely used to date. Here, we demonstrate how the empirical formulation of Davenport is consistent with the analysis of Baars et al. (Journal of Fluid Mechanics, 20..

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Funding Acknowledgements

The authors acknowledge financial support by the Australian Research Council and by the University of Melbourne through the McKenzie fellowship program. We further thank Dr. Kapil Chauhan for making the de-trended data available to us.