100 research outputs found
Homogeneous Isotropic Superfluid Turbulence in Two Dimensions: Inverse and Forward Cascades in the Hall-Vinen-Bekharevich-Khalatnikov model
We present the first direct-numerical-simulation study of the statistical
properties of two-dimensional superfluid turbulence in the
Hall-Vinen-Bekharevich-Khalatnikov two-fluid model. We show that both
normal-fluid and superfluid energy spectra can exhibit two power-law regimes,
the first associated with an inverse cascade of energy and the second with the
forward cascade of enstrophy. We quantify the mutual-friction-induced alignment
of normal and superfluid velocities by obtaining probability distribution
functions of the angle between them and the ratio of their moduli. Our study
leads to specific suggestions for experiments
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