globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015MS000548
Scopus记录号: 2-s2.0-84975784544
论文题名:
A two Turbulence Kinetic Energy model as a scale-adaptive approach to modeling the planetary boundary layer
作者: Bhattacharya R; , Stevens B
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2016
卷: 8, 期:1
起始页码: 224
结束页码: 243
语种: 英语
英文关键词: Boundary layers ; Kinetic energy ; Kinetics ; Large eddy simulation ; Mixing ; Turbulence ; Adaptive approach ; Large-scale modeling ; Nonlocal models ; Planetary boundary layers ; Reynold save raging ; System of equations ; Turbulence kinetic energy ; Turbulent cascade ; Atmospheric thermodynamics ; atmospheric modeling ; boundary layer ; deep mixing method ; kinetic energy ; large eddy simulation ; mixing ratio ; turbulent flow ; turbulent mixing
英文摘要: A two Turbulence Kinetic Energy (2TKE) model is developed to address the boundary layer "grey zone" problem. The model combines ideas from local and nonlocal models into a single energetically consistent framework. By applying the Reynolds averaging to the large eddy simulation (LES) equations that employ Deardorff's subgrid TKE, we arrive at a system of equations for the boundary layer quantities and two turbulence kinetic energies: one which encapsulates the TKE of large boundary-layer-scale eddies and another which represents the energy of eddies subgrid to the vertical grid size of a typical large-scale model. These two energies are linked via the turbulent cascade of energy from larger to smaller scales and are used to model the mixing in the boundary layer. The model is evaluated for three dry test cases and found to compare favorably to large eddy simulations. The usage of two TKEs for mixing helps reduce the dependency of the model on the vertical grid scale as well as on the free tropospheric stability and facilitates a smoother transition from convective to stable regimes. The usage of two TKEs representing two ranges of scales satisfies the prerequisite for modeling the boundary layer in the "grey zone": an idea that is explored further in a companion paper. © 2016. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75935
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Max Planck Institute for Meteorology, Hamburg, Germany; International Max Planck Research School, Max Planck Institute for Meteorology, Hamburg, Germany; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States

Recommended Citation:
Bhattacharya R,, Stevens B. A two Turbulence Kinetic Energy model as a scale-adaptive approach to modeling the planetary boundary layer[J]. Journal of Advances in Modeling Earth Systems,2016-01-01,8(1)
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