On two-dimensionalization of three-dimensional turbulence in shell models

On two-dimensionalization of three-dimensional turbulence in shell models
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壳模型中三维湍流的二维化

DOI:
10.1140/epjb/e2010-00003-0
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发表时间:
2010
期刊:
The European Physical Journal B
影响因子:
--
通讯作者:
A. Sarkar
A. Sarkar
中科院分区:
--
文献类型:
--
作者:
S. Chakraborty;M. H. Jensen;A. Sarkar

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应用改进的Gledzer-Ohkitani-Yamada(GOY)壳模型,研究和再现了三维不可压缩、均匀、各向同性、充分发展的非受迫湍流的二维化效应。在壳模型的框架内,我们得到了以下结果:(i)逐步陡峭的能谱的旋转强度的增加,和,(ii)耗尽的能量通量的向前向前级联,有时会导致一个逆级联。存在的扩展自相似性和自相似PDF的纵向速度差旋转三维湍流的情况下也提出了。
Applying a modified version of the Gledzer-Ohkitani-Yamada (GOY) shell model, the signatures of so-called two-dimensionalization effect of three-dimensional incompressible, homogeneous, isotropic fully developed unforced turbulence have been studied and reproduced. Within the framework of shell models we have obtained the following results: (i) progressive steepening of the energy spectrum with increased strength of the rotation, and, (ii) depletion in the energy flux of the forward forward cascade, sometimes leading to an inverse cascade. The presence of extended self-similarity and self-similar PDFs for longitudinal velocity differences are also presented for the rotating 3D turbulence case.
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影响因子: --
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