TY - JOUR

T1 - Emission of discrete vortex rings by a vibrating grid in superfluid He-3-B : a precursor to quantum turbulence.

AU - Bradley, D. Ian

AU - Clubb, D. O.

AU - Fisher, Shaun N.

AU - Guénault, A.M.

AU - Haley, Richard P.

AU - Matthews, C. J.

AU - Pickett, George R.

AU - Tsepelin, Viktor

AU - Zaki, K.

PY - 2005/7/13

Y1 - 2005/7/13

N2 - We report a transition in the vorticity generated by a grid moving in the B phase of superfluid He-3 at T < T-c. The evolution of the vorticity after arresting the grid shows a dramatic change in the decay rate at a critical grid velocity. We believe this to reflect a sharp transition from ballistic vortex-ring production at low grid velocities to quantum turbulence at higher velocities and that independent isolated vortex rings provide the precursors to the developed turbulence. Furthermore we believe that this may be a feature of all quantum turbulence arising from repetitive mechanical agitation.

AB - We report a transition in the vorticity generated by a grid moving in the B phase of superfluid He-3 at T < T-c. The evolution of the vorticity after arresting the grid shows a dramatic change in the decay rate at a critical grid velocity. We believe this to reflect a sharp transition from ballistic vortex-ring production at low grid velocities to quantum turbulence at higher velocities and that independent isolated vortex rings provide the precursors to the developed turbulence. Furthermore we believe that this may be a feature of all quantum turbulence arising from repetitive mechanical agitation.

KW - VORTEX RINGS

KW - GRID

KW - SUPERFLUID

KW - TURBULENCE

U2 - 10.1103/PhysRevLett.95.035302

DO - 10.1103/PhysRevLett.95.035302

M3 - Journal article

VL - 95

SP - 035302

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 3

ER -