| Principle of Cross Coupling Between Vertical Heat Turbulent Transport and Vertical Velocity and Determination of Cross Coupling Coefficient |
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| 作者姓名： | CHEN Jinbei HU Yinqiao ZHANG Lei |
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| 作者单位： | [1]College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000 [2]Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences, Gansu Province Key Laboratory of Arid Climatic Change and Reducing Disaster, Lanzhou 730000 [3]Department of Environment and Resource, Gansu Agriculture University, Lanzhou 730060 |
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| 摘 要： | It has been proved that there exists a cross coupling
between vertical heat turbulent transport and vertical velocity by
using linear thermodynamics. This result asserts that the vertical
component of heat turbulent transport flux is composed of both the
transport of the vertical potential temperature gradient and the
coupling transport of the vertical velocity. In this paper, the
coupling effect of vertical velocity on vertical heat turbulent
transportation is validated by using observed data from the
atmospheric boundary layer to determine cross coupling coefficients,
and a series of significant properties of turbulent transportation
are opened out. These properties indicate that the cross coupling
coefficient is a logarithm function of the dimensionless vertical
velocity and dimensionless height, and is not only related to the
friction velocity u*, but also to the coupling roughness
height zW0 and the coupling temperature TW0 of the
vertical velocity. In addition, the function relations suggest that
only when the vertical velocity magnitude conforms to the limitation
|W/u*|≠1, and is above the level zW0, then the
vertical velocity leads to the cross coupling effect on the vertical
heat turbulent transport flux. The cross coupling theory and
experimental results provide a challenge to the traditional
turbulent K closure theory and the Monin-Obukhov similarity
theory.
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| 关 键 词： | 交叉耦合系数 湍流输送 热量垂直输送 垂直速度 线性热动力学 大气边界层 |
| 收稿时间： | 2005-07-20 |
| 修稿时间： | 2006-05-08 |
Principle of Cross Coupling Between Vertical Heat Turbulent
Transport and Vertical Velocity and Determination
of Cross Coupling Coefficient |
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| CHEN Jinbei,HU Yinqiao,ZHANG Lei.Principle of Cross Coupling Between Vertical Heat Turbulent Transport and Vertical Velocity and Determination of Cross Coupling Coefficient[J].Advances in Atmospheric Sciences,2007,24(1):89-100. |
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| Authors: | CHEN Jinbei HU Yinqiao and ZHANG Lei |
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| Institution: | College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000; Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences,
Gansu Province Key Laboratory of Arid Climatic Change and Reducing Disaster, Lanzhou 730000; Department of Environment and Resource, Gansu Agriculture University, Lanzhou 730060,College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000; Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences, Gansu Province Key Laboratory of Arid Climatic Change and Reducing Disaster, Lanzhou 730000,College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000 |
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| Abstract: | It has been proved that there exists a cross coupling between vertical heat turbulent transport and vertical velocity by using linear thermodynamics. This result asserts that the vertical component of heat turbulent transport flux is composed of both the transport of the vertical potential temperature gralient and the coupling transport of the vertical velocity. In this paper, the coupling effect of vertical velocity on vertical heat turbulent transportation is validated by using observed data from the atmospheric boundary layer to determine cross coupling coefficients, and a series of significant properties of turbulent transportation are opened out. These properties indicate that the cross coupling coefficient is a logarithm function of the dimensionless vertical velocity and dimensionless height, and is not only related to the friction velocity u*,but also to the coupling roughness height zwo and the coupling temperature Two of the vertical velocity.In addition, the function relations suggest that only when the vertical velocity magnitude conforms to the limitation |W/u* | ≠ 1, and is above the level zwo, then the vertical velocity leads to the cross coupling effect on the vertical heat turbulent transport flux. The cross coupling theory and experimental results provide a challenge to the traditional turbulent K closure theory and the Monin-Obukhov similarity theory. |
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| Keywords: | linear thermodynamic turbulent transportation atmospheric boundary layer coupling coefficients |
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