A novel idea: Calculating anisotropic turbulence only by Kolmogorov structure constant Cn2 and power law α

A novel idea: Calculating anisotropic turbulence only by Kolmogorov structure constant Cn2 and power law α
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一个新颖的想法:仅通过柯尔莫哥洛夫结构常数Cn2和幂律α计算各向异性湍流

DOI:
10.1016/j.rinp.2020.103483
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发表时间:
2020-09
期刊:
影响因子:
5.3
通讯作者:
Zhai Chao
Zhai Chao
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhai Chao

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本研究表明,各向异性非Kolmogorov湍流模型更符合实际湍流情况。然而,各向异性因子对计算的准确性至关重要,精确测量它是一项具有挑战性的任务。本文利用三种建模方法,推导了各向异性非Kolmogorov结构常数与Kolmogorov结构常数之间的四种不同的等价公式,并将其应用于已有的各向异性结果。结果表明,各向异性因子被消除,各向异性湍流可以只用Kolmogorov结构常数和幂律来预测。
As stated in the present research, the anisotropic non-Kolmogorov turbulence model is more in line with the actual turbulence. However, anisotropic factor is vital for the accuracy of calculations, and measuring it precisely is a challenging task. In this paper, utilizing three modeling approaches, we derive four different equivalence formulas between the anisotropic non-Kolmogorov and the Kolmogorov structure constants, and apply them to the extant anisotropic results. It is found that the anisotropic factor is eliminated and the anisotropic turbulence can be predicted only by Kolmogorov structure constant and power law.
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