Friction-enhanced lifetime of bundled quantum vortices
Luca Galantucci, Giorgio Krstulovic, Carlo F. Barenghi
Abstract
Numerical simulations of superfluid helium turbulent flows show the emergence of hydrodynamic cooperation between quantum vortices leading to dynamics almost without dissipation. This energy saving mechanism accounts for the enhanced vortex lifetime observed in experiments and is similar to the collective dynamics observed in active fluids, such as bacteria in aqueous suspensions, fungal spores in the atmosphere, and cyclists in pelotons. This active fluid characteristic of superfluid helium potentially determines properties of turbulence in both the inviscid and the viscous fluid components.
Topics & Concepts
Inviscid flowVortexSuperfluidityTurbulenceQuantum turbulenceDissipationPhysicsSuperfluid helium-4Quantum fluidQuantum vortexMechanicsHeliumVorticityClassical mechanicsCondensed matter physicsThermodynamicsAtomic physicsQuantum, superfluid, helium dynamicsCold Atom Physics and Bose-Einstein CondensatesSpacecraft and Cryogenic Technologies