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arXiv · 1512.03382

Grid superfluid turbulence and intermittency at very low temperature

Giorgio Krstulovic
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Abstract

Low-temperature grid generated turbulence is investigated by using numerical simulations of the Gross-Pitaevskii equation. The statistics of regularized velocity increments are studied. Increments of the incompressible velocity are found to be skewed for turbulent states. Results are later confronted with the (quasi) homogeneous and isotropic Taylor-Green flow, revealing the universality of the statistics. For this flow, the statistics are found to be intermittent and a Kolmogorov constant close to the one of classical fluid is found for the second order structure function.

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Giorgio Krstulovic. 2016-06-01. Grid superfluid turbulence and intermittency at very low temperature. https://doi.org/10.1103/physreve.93.063104

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