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Abstract
Conventionally neutral atmospheric boundary layers (CNBLs), which are characterized with zero surface potential temperature flux and capped by an inversion of potential temperature, are frequently encountered in nature. Therefore, predicting the wind speed profiles of CNBLs is relevant for weather forecasting, climate modeling, and wind energy applications. However, previous attempts to predict the velocity profiles in CNBLs have had limited success due to the complicated interplay between buoyancy, shear, and Coriolis effects. Here, we utilize ideas from the classical Monin-Obukhov similarity theory in combination with a local scaling hypothesis to derive an analytic expression for the stability correction function ψ=−cψ(z/L)1/2, where cψ=4.2 is an empirical constant, z is the height above ground, and L is the local Obukhov length based on potential temperature flux at that height, for CNBLs. An analytic expression for this flux is also derived using dimensional analysis and a perturbation method approach. We find that the derived profile agrees excellently with the velocity profile in the entire boundary layer obtained from high-fidelity large eddy simulations of typical CNBLs.
Original language | English |
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Article number | 104502 |
Journal | Physical review letters |
Volume | 126 |
Issue number | 10 |
DOIs | |
Publication status | Published - 9 Mar 2021 |
Keywords
- 2024 OA procedure
Fingerprint
Dive into the research topics of 'Universal wind profile for conventionally neutral atmospheric boundary layers'. Together they form a unique fingerprint.Activities
- 1 Oral presentation
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Vertical structure of conventionally neutral atmospheric boundary layers
Liu, L. (Speaker) & Stevens, R. J. A. M. (Contributor)
16 Nov 2021Activity: Talk or presentation › Oral presentation
Research output
- 20 Citations
- 1 PhD Thesis - Research external, graduation UT
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Large eddy simulations of stratified atmospheric boundary layers and wind farms
Nagarada Gadde, S., 19 May 2021, Enschede: University of Twente. 203 p.Research output: Thesis › PhD Thesis - Research external, graduation UT
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