dc.contributor.author |
Kruglov, Vladimir |
en |
dc.date.accessioned |
2012-05-25T02:42:38Z |
en |
dc.date.issued |
2011 |
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dc.identifier.citation |
Physics Letters, Section A: General, Atomic and Solid State Physics 375(45):4058-4064 2011 |
en |
dc.identifier.issn |
0375-9601 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/18447 |
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dc.description.abstract |
Two mechanisms of transition of the superfluid liquid 4He to quantum turbulence regimes are proposed for the case when the influence of the normal fluid on superfluid flow is suppressed by introducing superleaks at the ends of the capillary. Using dimensional analysis it is found that in the roton mechanism the critical velocity depends on channel size as vc∝d−1/4, matching the experiments. For the second, super-flow mechanism, the analysis of independent parameters relevant for this phenomena leads to critical velocity depending on d as vc∝d−1. It is shown that turbulence for super-flow mechanism arises when a “quantum Reynolds number” exceeds some critical value which is about 103 for 1D geometry. The dimensional analysis of the equation for critical velocity of superfluid flow without superleaks at the ends of the capillary is also presented. |
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dc.publisher |
Elsevier BV |
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dc.relation.ispartofseries |
Physics Letters, Section A: General, Atomic and Solid State Physics |
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dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
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dc.title |
Critical velocities and two mechanisms of transition in superfluid liquid 4He |
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dc.type |
Journal Article |
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dc.identifier.doi |
10.1016/j.physleta.2011.09.022 |
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pubs.issue |
45 |
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pubs.begin-page |
4058 |
en |
pubs.volume |
375 |
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dc.rights.holder |
Copyright: Elsevier BV |
en |
pubs.end-page |
4064 |
en |
pubs.publication-status |
Published |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
235243 |
en |
pubs.record-created-at-source-date |
2012-03-22 |
en |