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A wavenumber-frequency spectral model for atmospheric boundary layers

Title data

Wilczek, Michael ; Stevens, Richard J. A. M. ; Narita, Yasuhito ; Meneveau, Charles:
A wavenumber-frequency spectral model for atmospheric boundary layers.
In: Journal of Physics: Conference Series. Vol. 524 (2014) . - No. 012104.
ISSN 1742-6596
DOI: https://doi.org/10.1088/1742-6596/524/1/012104

Abstract in another language

Motivated by the need to characterize power fluctuations in wind farms, we study spatio-temporal correlations of a neutral atmospheric boundary layer in terms of the joint wavenumber-frequency spectrum of the streamwise velocity fluctuations. To this end, we perform a theoretical analysis of a simple advection model featuring the advection of small-scale velocity fluctuations by the mean flow and large-scale velocity fluctuations. The model is compared to data from large-eddy simulations (LES). We find that the model captures the trends observed in LES, specifically a Doppler shift of frequencies due to the mean flow as well as a Doppler broadening due to random sweeping effects.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics I > Chair Theoretical Physics I - Univ.-Prof. Dr. Michael Wilczek
Profile Fields > Advanced Fields > Nonlinear Dynamics
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 23 Feb 2022 11:05
Last Modified: 23 Feb 2022 11:05
URI: https://eref.uni-bayreuth.de/id/eprint/67582