Dissipation enhancement from a single vortex reconnection in superfluid helium
arXiv:1303.6852 · doi:10.1103/PhysRevB.88.054511
Abstract
We investigate a single vortex reconnection event in superfluid helium at finite temperatures using the vortex filament model. The reconnection induces Kelvin waves which strongly increase energy dissipation. We evaluate the mutual friction dissipation from the reconnection and show that the dissipation power has universal form, which is seen by scaling both time (measured from the reconnection event) and power by the mutual friction parameter alpha. This observation allows us to conclude that the Kelvin-wave cascade is not important in the energy dissipation process within the range alpha > 0.001. Rather, the energy is directly transferred from Kelvin waves to the normal component. Moreover, while the excited Kelvin waves greatly enhance energy dissipation, no similar change is seen in angular momentum from the reconnection event. This result has similarities with recent 3He-B measurements. Our results also confirm another earlier observation that the minimum distance between vortices scales approximately as d ~ sqrt(|t-trec|), both before and after the reconnection event.
8 pages, 6 figures; v2: moderate changes; v3: minor changes
References in corpus (9)
- Characterization of reconnecting vortices in superfluid helium
- Velocity Statistics Distinguish Quantum Turbulence from Classical Turbulence
- Quantum vortex reconnections
- Quantum turbulence in propagating superfluid vortex front
- Cascade of vortex loops initiated by a single reconnection of quantum vortices
- Super Stability of Laminar Vortex Flow in Superfluid 3He-B
- Energy and angular momentum balance in wall-bounded superfluid turbulence
- Temperature suppression of Kelvin-wave turbulence in superfluids
- Identification of Kelvin waves: numerical challenges
Cited by in corpus (14)
- Vortex filament method as a tool for computational visualization of quantum turbulence
- Structure of quantum vortex tangle in He-4 counterflow turbulence
- Rotating quantum turbulence in the unitary Fermi gas
- Reconnections of quantized vortex rings in superfluid He at very low temperatures
- Kelvin waves and the decay of quantum superfluid turbulence
- Quantum turbulence in superfluids with wall-clamped normal component
- Interactions between unidirectional quantized vortex rings
- Reconnection of vortex filaments and Kolmogorov spectrum
- Dissipative quintessence, and its cosmological implications
- Dynamics of quantized vortices moving towards reconnection
- Kelvin waves from vortex reconnection in superfluid helium at low temperatures
- Scattering of Line-Ring Vortices in a Superfluid
- Reconnection dynamics and mutual friction in quantum turbulence
- Comment on "Reconnection of quantized vortex filaments and the Kolmogorov spectrum"