Niemetz, M. and Schoepe, Wilfried (2002) On the statistical analysis of single vortex nucleation events in superfluid He-4. JOURNAL OF LOW TEMPERATURE PHYSICS, 126 (3-4). pp. 805-814. ISSN 0022-2291
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We investigate the statistical properties of single phase slip events observed in vortex nucleation experiments in He-4 by the groups in Berkeley and Paris. From the cumulative distribution. function of the events we calculate the slip rate as a function of flow velocity. The critical velocity is defined as the mean velocity and its statistical width as the standard deviation. From the slip rate and from the observed linear temperature dependence of the critical velocity,we obtain the energy barrier for vortex nucleation which is a quadratic function of the flow velocity. A comparison with the statistical properties of the laminar to turbulent transition in the flow around an oscillating sphere shows strikingly different behaviour.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Prof. Wilfried Schoepe |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Nov 2021 14:44 |
| Last Modified: | 10 Nov 2021 14:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40634 |
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