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Turbulence models for cfd in the 21st century

机译:21世纪CFD的湍流模型

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The two approaches to turbulence modelling Both Osborne Reynolds (1884) and Ludwig Prandtl (1925) regarded turbulence as an expression of the near-random intermingling of sizeable fragments of unlike fluid, which, during a succession of brief encounters, bended to equilibrium. Their concept found however no explicit place in the family of turbulence models springing from Kolmogorov's (1942) proposal to attend only to statistical measures of the turbulent motion, such as energy and frequency. The intermingling-fragments idea was nevertheless preserved in the models of Spalding (1971) and Magnussen (1976) ("eddy-break-up" and "eddy-dissipation", respectively) which are still used for combustion simulation.
机译:湍流建模的两种方法Osborne Reynolds(1884)和Ludwig Prandtl(1925)都将湍流看作是大小不等的流体的近乎随机混合的一种表达,在一系列短暂的相遇中,它们趋于平衡。然而,他们的概念在湍流模型家族中没有明显的位置,该模型源于Kolmogorov(1942)的提议,该提议仅关注湍流运动的统计度量,例如能量和频率。尽管如此,在Spalding(1971)和Magnussen(1976)的模型(分别为“涡流分解”和“涡流消散”)模型中仍然保留了混合碎片的思想,这些模型仍用于燃烧模拟。

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