A wavenumber-frequency spectral model for atmospheric boundary layers

Michael Wilczek, Richard J.A.M. Stevens, Yasuhito Narita, Charles Meneveau

Research output: Contribution to journalConference articleAcademicpeer-review

3 Citations (Scopus)
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Abstract

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.
Original languageEnglish
Article number012104
JournalJournal of physics: Conference series
Volume524
DOIs
Publication statusPublished - 2014
EventThe Science of Making Torque from Wind, TORQUE 2014 - Copenhagen, Denmark
Duration: 18 Jun 201420 Jun 2014

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atmospheric boundary layer
large eddy simulation
advection
trends
shift

Cite this

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title = "A wavenumber-frequency spectral model for atmospheric boundary layers",
abstract = "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.",
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A wavenumber-frequency spectral model for atmospheric boundary layers. / Wilczek, Michael; Stevens, Richard J.A.M.; Narita, Yasuhito; Meneveau, Charles.

In: Journal of physics: Conference series, Vol. 524, 012104, 2014.

Research output: Contribution to journalConference articleAcademicpeer-review

TY - JOUR

T1 - A wavenumber-frequency spectral model for atmospheric boundary layers

AU - Wilczek, Michael

AU - Stevens, Richard J.A.M.

AU - Narita, Yasuhito

AU - Meneveau, Charles

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

U2 - 10.1088/1742-6596/524/1/012104

DO - 10.1088/1742-6596/524/1/012104

M3 - Conference article

VL - 524

JO - Journal of physics: Conference series

JF - Journal of physics: Conference series

SN - 1742-6588

M1 - 012104

ER -