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arXiv · 2605.25915

Mutual Friction in Dissipative Gross-Pitaevskii Thermal Counterflow Turbulence

Kyo Yoshida·Hideaki Miura·Yoshiyuki Tsuji
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Abstract

We report numerical simulations of the dissipative Gross-Pitaevskii equation for a bulk region of thermal-counterflow turbulence. Quasistationary states are obtained over a range of forcing, damping, and healing-length parameters. The mutual-friction acceleration exhibits cubic scaling with the mean relative velocity between the superfluid and normal-fluid components, and the coefficient of this scaling is linked to the phenomenological damping parameter. The intervortex spacing follows the expected dimensional scaling in the weak-forcing regime. Comparison with a straight-vortex-line model suggests that the vortex-line orientations are nearly isotropic.

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Kyo Yoshida, Hideaki Miura, Yoshiyuki Tsuji. 2026-05-25. Mutual Friction in Dissipative Gross-Pitaevskii Thermal Counterflow Turbulence. https://arxiv.org/abs/2605.25915

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