Phase diagram of turbulence in superfluid 3He-B

Details Phase diagram of turbulence in superfluid 3He-B Phase diagram of turbulence in superfluid 3He-B

2004-05-26

arxiv.org/abs/cond-mat/0405608v1

J. Low Temp. Phys. 138, 567 (2005)

Physics

Condensed Matter

Other Condensed Matter

To be published in J. Low Temp. Phys. (QFS2004 proceedings)

Scientific paper

10.1007/s10909-005-2263-6

In superfluid 3He-B mutual-friction damping of vortex-line motion decreases roughly exponentially with temperature. We record as a function of temperature and pressure the transition from regular vortex motion at high temperatures to turbulence at low temperatures. The measurements are performed with non-invasive NMR techniques, by injecting vortex loops into a long column in vortex-free rotation. The results display the phase diagram of turbulence at high flow velocities where the transition from regular to turbulent dynamics is velocity independent. At the three measured pressures 10.2, 29.0, and 34 bar, the transition is centered at 0.52--0.59Tc and has a narrow width of 0.06Tc while at zero pressure turbulence is not observed above 0.45Tc.

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