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Modelling turbulence and turbulent dispersion in the stratified atmospheric boundary layer by PDF methods

机译:用PDF方法模拟分层大气边界层中的湍流和湍流扩散

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A new model concept is presented for the description of turbulence and transport of reactive substances in the stratified atmospheric boundary layer. All the flow field and the transport of substances are described by the motion of fluid particles and change of their properties as composition or temperature. The essential advantage of this concept over other methods consists in the simulation of mixing processes of particle properties and the exact treatment of arbitrary complicated reaction schemes. These are the main stumbling blocks in conventional methods and may be the reason for errors of several orders of magnitude in concentration calculations. Essential features of this approach are illustrated and computational aspects are discussed.
机译:提出了一种新的模型概念,用于描述分层大气边界层中反应性物质的湍流和传输。所有的流场和物质的运输都通过流体颗粒的运动及其性质,组成或温度的变化来描述。与其他方法相比,此概念的主要优点在于模拟了粒子特性的混合过程以及对任意复杂反应方案的精确处理。这些是常规方法中的主要绊脚石,并且可能是浓度计算中几个数量级误差的原因。说明了该方法的基本特征,并讨论了计算方面。

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