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arXiv 0709.0368cond-mat.otherphysics.class-phphysics.flu-dyn
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超流turbulence中的涡旋谱:对最近实验的解释

Vortex spectrum in superfluid turbulence: interpretation of a recent experiment

Philippe-Emmanuel P. -E. Roche, Carlo F. Barenghi

摘要:

我们讨论了最近的一个实验中,涡线密度波动的频谱已被测量的超流湍流。观察到的频率依赖性的频谱,$f^{-5/3}$,不同意与经典的涡度谱,如果按照文献,涡线密度被解释为涡度或拟能的措施。我们认为,如果涡线密度场被分解成一个极化的领域(其中携带的大部分能量)和各向同性的领域(这是负责的频谱)的分歧得到解决。

英文摘要:

We discuss a recent experiment in which the spectrum of the vortex line density fluctuations has been measured in superfluid turbulence. The observed frequency dependence of the spectrum, $f^{-5/3}$, disagrees with classical vorticity spectra if, following the literature, the vortex line density is interpreted as a measure of the vorticity or enstrophy. We argue that the disagrement is solved if the vortex line density field is decomposed into a polarised field (which carries most of the energy) and an isotropic field (which is responsible for the spectrum).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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