Multiscaling in superfluid turbulence: A shell-model study.
Multiscaling in superfluid turbulence: A shell-model study.
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DOI：
10.1103/physreve.94.043101
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发表时间：
2015-08
期刊：
影响因子：
--
通讯作者：
V. Shukla;R. Pandit
中科院分区：
文献类型：
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作者：
V. Shukla;R. Pandit
利用三维Hall-Vinen-Bekharevich-Khalatnikov（HVBK）方程的壳模型，研究了三维超流湍流中正常速度结构函数和超流速度结构函数的多尺度行为.我们的3D-HVBK壳模型基于Gledzer-Okhitani-Yamada壳模型。我们研究的多标度指数的正常流体分数和相互摩擦系数的依赖性。我们对3D-HVBK壳模型的深入研究表明，超流湍流中速度结构函数的多尺度行为比流体湍流中更为复杂。
We examine the multiscaling behavior of the normal- and superfluid-velocity structure functions in three-dimensional superfluid turbulence by using a shell model for the three-dimensional (3D) Hall-Vinen-Bekharevich-Khalatnikov (HVBK) equations. Our 3D-HVBK shell model is based on the Gledzer-Okhitani-Yamada shell model. We examine the dependence of the multiscaling exponents on the normal-fluid fraction and the mutual-friction coefficients. Our extensive study of the 3D-HVBK shell model shows that the multiscaling behavior of the velocity structure functions in superfluid turbulence is more complicated than it is in fluid turbulence.