Non-stationary Boundary Layers

Non-stationary Boundary Layers
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非平稳边界层

DOI:
10.1007/s10546-020-00533-w
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发表时间:
2020
影响因子:
4.3
通讯作者:
Bou-Zeid, Elie
Bou-Zeid, Elie
中科院分区:
地球科学3区
文献类型:
--
作者:
Mahrt, L.;Bou-Zeid, Elie

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文献包括各种各样的定义或非平稳性的看法。非定常性可以用湍流统计或湍流强迫的可变性来表示,例如风矢量、水平压力梯度或表面热通量的时间变化。我们的调查强调发展的非平衡湍流所造成的非定常强迫。湍流的非平衡程度最可靠的评估是跟随局部流动,而不是使用更可用的固定点测量。我们调查的方法,以消除非平稳记录或部分过滤掉的非平稳性。我们还总结了非平稳参数化的问题。由于随时间变化的波浪状态和表面粗糙度,海上的非平稳性可能很复杂。与不稳定边界层相比,在稳定边界层中非定常性的影响通常较少被理解。
The literature includes a wide variety of definitions or perceptions of non-stationarity. Non-stationarity can be expressed in terms of turbulence statistics or variability of the forcing of the turbulence such as time changes of the wind vector, the horizontal pressure gradient, or the surface heat flux. Our survey emphasizes the development of non-equilibrium turbulence caused by non-stationary forcing. The degree of non-equilibrium of the turbulence is most reliably evaluated following the local flow rather than using the more available fixed-point measurements. We survey methods to eliminate non-stationary records or partially filter out the non-stationarity. We also summarize issues with parametrization of the non-stationarity. Non-stationarity over the sea can be complex due to time-dependent wave state and surface roughness. The impact of non-stationarity is generally less understood in the stable boundary layer compared to the unstable boundary layer.
DOI: --
发表时间: 2012
期刊:
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发表时间: 2015-09
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通讯作者: Jielun Sun;C. Nappo;L. Mahrt;D. Belušić;B. Grisogono;David R. Stauffer;Manuel Pulido;Chantal Staquet;Qingfang Jiang;Annick Pouquet;Carlos Yagüe;B. Galperin;Ronald B. Smith;John J. Finnigan;Shane D. Mayor;G. Svensson;Andrey A. Grachev;William D. Neff