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DOI | 10.1175/JAS-D-16-0215.1 |
Modeling Atmospheric Turbulence via Rapid Distortion Theory: Spectral Tensor of Velocity and Buoyancy | |
Chougule, Abhijit1; Mann, Jakob2; Kelly, Mark2; Larsen, Gunner C.2 | |
2017-04-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Norway; Denmark |
英文摘要 | A spectral tensor model is presented for turbulent fluctuations of wind velocity components and temperature, assuming uniform vertical gradients in mean temperature and mean wind speed. The model is built upon rapid distortion theory (RDT) following studies by Mann and by Hanazaki and Hunt, using the eddy lifetime parameterization of Mann to make the model stationary. The buoyant spectral tensor model is driven via five parameters: the viscous dissipation rate epsilon, length scale of energy-containing eddies L, a turbulence anisotropy parameter Gamma, gradient Richardson number (Ri) representing the local atmospheric stability, and the rate of destruction of temperature variance eta(theta). Model output includes velocity and temperature spectra and associated cospectra, including those of longitudinal and vertical temperature fluxes. The model also produces two-point statistics, such as coherences and phases of velocity components and temperature. The statistics of uniformly sheared and stratified turbulence from the model are compared with atmospheric observations taken from the Horizontal Array Turbulence Study (HATS) field program, and model results fit observed one-dimensional spectra quite well. For highly unstable stratification, however, the model has deficiencies at low wavenumbers that limit its prediction of longitudinal velocity component spectra at scales on the order of 0.6 km. The model predicts coherences well for horizontal separations but overestimates vertical coherence with increasing separation. Finally, it is shown that the RDT output can deviate from Monin-Obukhov similarity theory. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399333700001 |
WOS关键词 | STABLY STRATIFIED TURBULENCE ; SURFACE-LAYER TURBULENCE ; SIMILARITY ; SIMULATION ; PROFILE ; SCALE ; FLOW |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29398 |
专题 | 地球科学 |
作者单位 | 1.Univ Agder, Dept Engn Sci, Grimstad, Norway; 2.Tech Univ Denmark, Wind Energy Dept, Riso Campus, Roskilde, Denmark |
推荐引用方式 GB/T 7714 | Chougule, Abhijit,Mann, Jakob,Kelly, Mark,et al. Modeling Atmospheric Turbulence via Rapid Distortion Theory: Spectral Tensor of Velocity and Buoyancy[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(4). |
APA | Chougule, Abhijit,Mann, Jakob,Kelly, Mark,&Larsen, Gunner C..(2017).Modeling Atmospheric Turbulence via Rapid Distortion Theory: Spectral Tensor of Velocity and Buoyancy.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(4). |
MLA | Chougule, Abhijit,et al."Modeling Atmospheric Turbulence via Rapid Distortion Theory: Spectral Tensor of Velocity and Buoyancy".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.4(2017). |
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