Transilient Turbulence Theory. Part I: The Concept of Eddy-Mixing across Finite Distances
Transilient Turbulence Theory. Part I: The Concept of Eddy-Mixing across Finite Distances
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瞬态湍流理论。
DOI：
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发表时间：
1984
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通讯作者：
R. Stull
中科院分区：
文献类型：
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作者：
R. Stull
摘要发展了一个描述涡状混合的一阶湍流理论。这种方法以一个拉丁词命名为transilient theory，意思是“跨越”，它模拟了空间中分离的点阵列之间的湍流混合。它不同于涡扩散理论，因为它不限于相邻点之间的湍流传输。通过明确地包括“大涡”效应，它可以处理零梯度和反梯度情况下的混合，例如在对流混合层中发现的混合。应用可能包括污染物扩散、边界层模拟和云卷吸研究。
Abstract A first-order turbulence theory is developed that describes eddy-like mixing. Named transilient theory after a Latin word meaning “leap across” this approach models the turbulent mixing between arrays of points separated in space. It differs from eddy-diffusivity theory in that it is not restricted to turbulent transfer between adjacent points. By explicitly including “large eddy” effects it can handle mixing across zero-gradient and counter-gradient situations such as found in convective mixed layers. Applications might include pollutant dispersion, boundary layer modeling and cloud entrainment studies.