Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2010-05-04
Phys. Rev. Lett. 105, 125301 (2010)
Physics
Condensed Matter
Other Condensed Matter
4 pages, 6 figures
Scientific paper
10.1103/PhysRevLett.105.125301
Vortex flow remains laminar up to large Reynolds numbers (Re~1000) in a cylinder filled with 3He-B. This is inferred from NMR measurements and numerical vortex filament calculations where we study the spin up and spin down responses of the superfluid component, after a sudden change in rotation velocity. In normal fluids and in superfluid 4He these responses are turbulent. In 3He-B the vortex core radius is much larger which reduces both surface pinning and vortex reconnections, the phenomena, which enhance vortex bending and the creation of turbulent tangles. Thus the origin for the greater stability of vortex flow in 3He-B is a quantum phenomenon. Only large flow perturbations are found to make the responses turbulent, such as the walls of a cubic container or the presence of invasive measuring probes inside the container.
Eltsov V. B.
Graaf R. de
Hänninen R.
Heikkinen Pekka J.
Hosio J. J.
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