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首页> 外文会议>24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics >Eddy transport in the stably stratified planetary boundary layers and in the free atmosphere: upper troposphere and lower stratosphere
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Eddy transport in the stably stratified planetary boundary layers and in the free atmosphere: upper troposphere and lower stratosphere

机译：在稳定分层的行星边界层和自由大气中的涡流传输：对流层上层和平流层下层

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Modeling turbulence is an important object of environmental sciences for describing an essential turbulent transport of heat and momentum in the boundary layer of the atmosphere. The many turbulence model used in the simulation of flows in the environment, based on the concept of eddy viscosity, and buoyancy effects are often included in the expression for the turbulent fluxes through empirical functions, based on the similarity theory of Monin-Obukhov, fair, strictly speaking, only in the surface layer. Furthermore, significant progress has been made in recent years in the development broader than standard hypothesis turbulent viscosity models for the eddy diffusivity momentum and heat, as result of the recording of differential equations for the Reynolds stresses and vector turbulent heat flux in a weaklyu0002equilibrium approximation, which neglects advection and the diffusion of certain dimensionless quantities. Explicit algebraic model turbulent Reynolds stresses and heat flux vector for the planetary boundary layer is used in the stableatmospheric boundary layer, the upper troposphere, and the lower stratosphere. The present algebraic model of turbulence built on physical principles RANS (Reynolds Average Navier Stokes) approach for stratified turbulence uses three prognostic equations and shows correct reproduction of the main characteristics of the stably stratified boundary layer and evaluated the vertical eddy diffusivities of momentum and heat in the upper troposphere and the lower stratosphere.
机译：对湍流进行建模是环境科学的重要对象，用于描述大气边界层中热量和动量的基本湍流传输。基于涡度粘度的概念，用于模拟环境中\ r \ n流动的许多湍流模型，基于相似性理论，通过经验函数对湍流的\ r \ n \ xpression通常包含浮力效应\ n \ n严格地说，仅在表面层。此外，近年来，在比涡旋扩散动量和热的标准假设湍流粘度模型更广泛的开发中，记录了雷诺应力和矢量湍流微分方程的结果通量处于弱的\ u0002平衡近似中，它忽略了对流和某些无量纲量的扩散。行星边界层的显式\ r \代数模型湍流雷诺应力和热通量矢量用于稳定的\ n \大气层边界层，对流层上层和平流层下层。 \ r \ n湍流的当前代数模型基于分层湍流的物理原理RANS（雷诺平均Navier斯托克斯）方法构建，使用了\ r \ n三个预测方程，并显示了对稳定分层边界\ r \ nlayer的主要特征的正确再现并进行了评估对流层高层和平流层较低层中动量和热量在垂直涡流中的扩散。

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