梯度扩散理论及Eulerian长度尺度模型

梯度扩散理论及Eulerian长度尺度模型

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contributed at 2018-12-04

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Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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Geography SubjectPhysical GeographyClimatology
Earth System SubjectEarth Surface SystemAtmosphere

Detailed Description

梯度扩散理论及Eulerian长度尺度模型

 

(1)梯度扩散理论:

式中,tHlE为相应的空气应力、热量和水汽通量;为平均空气密度;为平均风速、位温和比湿;Cp为空气定压比热;l为水汽潜热系数;z为高度;KmKhKw为动量、热量和水汽的湍流扩散系数,且:

式中,s代表mhwkVon Karman常数,取值0.4u*为摩擦速度,d为零面位移高度;f为无因次稳定度z的函数,LMonin-Obukhov长。

梯度扩散理论成立条件:

式中,左边为二级导数项或更高级的导数项,右边为一级导数项

(2)Eulerian长度尺度:

式中,LuEulerian长度尺度;为时间尺度;Ruu(t)为自相关系数;为速度。

 

参考文献

陈发祖:梯度扩散理论在能量和物质输送计算中的若干问题。地理研究,1990,9(2)

 

How to cite

《资源环境数学模型手册》 (2018). 梯度扩散理论及Eulerian长度尺度模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/9803daae-2896-48e8-8bc6-41782542ad29
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Contributor

contributed at 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feed back

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