Cf. Barenghi, VORTEX LINES AND TRANSITIONS IN SUPERFLUID HYDRODYNAMICS, Philosophical transactions-Royal Society of London. Physical sciences and engineering, 355(1731), 1997, pp. 2025-2034
Couette flow has been used as a benchmark to establish the equations o
f motion of superfluid helium and to study the nature and the motion o
f quantized vortex lines. This paper illustrates the transitions and t
he flow patterns which have been identified in helium Couette flows at
increasing velocity.