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首页> 外文会议>International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics >Mesoscale modeling of thermal circulation forced by airflow and urban heat island
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Mesoscale modeling of thermal circulation forced by airflow and urban heat island

机译：气流和城市热岛对热循环的中尺度模拟

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The modified three-parameter model of turbulence for a thermally stratified atmospheric boundary layer (ABL) is developed. The model is based on tensor-invariant parameterizations for the pressure-strain and pressure-temperature correlations that are more complete than the parameterizations used in the Mellor-Yamada model. The turbulent momentum and heat fluxes are calculated with explicit algebraic models obtained with the aid of symbol algebra from the transport equations for momentum and heat fluxes in the approximation of weakly equilibrium turbulence. The three-parameter model of thermally stratified turbulence is employed to obtain closed form algebraic expressions for the fluxes. The effects of urban roughness are parameterized. Results of 2D computational test of a 24-hour of the ABL evolution are presented. Comparison of the computed results with the available observational data and other numerical models shows that the proposed model is able to reproduce both the most important structural features of the turbulence in an urban canopy layer near the urbanized PBL surface and the effect of urban roughness on a global structure of the fields of wind andtemperature over a city.
机译：建立了热分层大气边界层（ABL）的改进的三参数湍流模型。该模型基于张量不变的参数化，用于压力-应变和压力-温度的相关性，比在Mellor-Yamada模型中使用的参数化更完整。湍流动量和热通量是使用显式代数模型计算的，该模型借助符号代数从弱平衡湍流近似中的动量和热通量的传输方程式中获得。采用热分层湍流的三参数模型来获得通量的闭式代数表达式。参数化城市粗糙度的影响。提出了24小时ABL演进的2D计算测试结果。将计算结果与可用的观测数据和其他数值模型进行比较，结果表明，该模型能够重现靠近城市化PBL表面的城市冠层湍流的最重要的结构特征，以及城市粗糙度对地形的影响。风电领域的全球结构 一个城市的温度。

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