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Modelling of Stably...
Modelling of Stably Stratified Atmospheric Boundary Layers with Varying Stratifications
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- Zeli, Velibor (författare)
- KTH,Linné Flow Center, FLOW
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- Brethouwer, Gert (författare)
- KTH,Linné Flow Center, FLOW,SeRC - Swedish e-Science Research Centre
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- Wallin, Stefan (författare)
- KTH,Linné Flow Center, FLOW,Mekanik
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- Johansson, Arne V., 1953- (författare)
- KTH,Linné Flow Center, FLOW,SeRC - Swedish e-Science Research Centre
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(creator_code:org_t)
- 2020-06-09
- 2020
- Engelska.
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Ingår i: Boundary-layer Meteorology. - : Springer. - 0006-8314 .- 1573-1472. ; 176:2, s. 229-249
- Relaterad länk:
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https://doi.org/10.1...
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https://link.springe...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A recently developed explicit algebraic Reynolds-stress (EARS) model is validated for an idealized representation of the night-time high-latitude stably stratified atmospheric boundary layer. The simulations are made with four surface cooling rates that result in weakly to moderately stratified stable boundary layers. The predictions of the EARS model are compared to high-resolution large-eddy simulations (LES) of Sullivan et al. (J Atmos Sci 73(4):1815–1840, 2016). First- and second-order statistics are shown to be well predicted by the EARS model. The EARS model also predicts the horizontal turbulent fluxes and turbulence anisotropy and these compare well with the LES results. The sensitivity to the model coefficients is studied by comparing the EARS model results with LES results. Finally, we propose a new scaling for the production of turbulence kinetic energy and show that the EARS model captures the essential trends of the LES results for different cooling rates.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- GABLS1
- Reynolds-stress model
- Scaling law
- Stably stratified atmosphere
- Turbulence parametrization
- Atmospheric movements
- Atmospheric thermodynamics
- Boundary layer flow
- Cooling
- Horizontal wells
- Kinetic energy
- Kinetics
- Large eddy simulation
- Reynolds number
- Turbulence
- High resolution
- Model coefficient
- Reynolds stress
- Second order statistics
- Stable boundary layer
- Surface cooling
- Turbulence anisotropy
- Turbulence kinetic energy
- Atmospheric boundary layer
- boundary layer
- computer simulation
- numerical model
- stratified flow
- turbulent flow
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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