Zuccher, S., Caliari, M., Baggaley, A.W. and Barenghi, C.F. (2012) Quantum vortex reconnections. Physics of Fluids, 24(12), p. 125108. (doi: 10.1063/1.4772198)
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Abstract
We study reconnections of quantum vortices by numerically solving the governing Gross-Pitaevskii equation. We find that the minimum distance between vortices scales differently with time before and after the vortex reconnection. We also compute vortex reconnections using the Biot-Savart law for vortex filaments of infinitesimal thickness, and find that, in this model, reconnections are time symmetric. We argue that the likely cause of the difference between the Gross-Pitaevskii model and the Biot-Savart model is the intense rarefaction wave which is radiated away from a Gross-Pitaeveskii reconnection. Finally we compare our results to experimental observations in superfluid helium and discuss the different length scales probed by the two models and by experiments.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Baggaley, Dr Andrew |
| Authors: | Zuccher, S., Caliari, M., Baggaley, A.W., and Barenghi, C.F. |
| College/School: | College of Science and Engineering > School of Mathematics and Statistics > Mathematics |
| Journal Name: | Physics of Fluids |
| Publisher: | American Institute of Physics |
| ISSN: | 1070-6631 |
| Published Online: | 27 December 2012 |
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