Vortex Multiplication in Applied Flow: the Precursor to Superfluid Turbulence

Details Vortex Multiplication in Applied Flow: the Precursor to Superfluid Turbulence Vortex Multiplication in Applied Flow: the Precursor to Superfluid Turbulence

2005-02-04

arxiv.org/abs/cond-mat/0502119v3

Phys. Rev. Lett. 96, 085301 (2006)

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 4 figures; version submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.96.085301

The dynamics of quantized vortices in rotating $^3$He-B is investigated in the low density (single-vortex) regime as a function of temperature. An abrupt transition is observed at $0.5 T_{\rm c}$. Above this temperature the number of vortex lines remains constant, as they evolve to their equilibrium positions. Below this temperature the number of vortices increases linearly in time until the vortex density has grown sufficiently for turbulence to switch on. On the basis of numerical calculations we suggest a mechanism responsible for vortex formation at low temperatures and identify the mutual friction parameter which governs its abrupt temperature dependence.

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