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| An intrinsic velocity-independent criterion for superfluid turbulence |
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| Author(s): Finne AP, Araki T, Blaauwgeers R, Eltsov VB, Kopnin NB, Krusius M, Skrbek L, Tsubota M, Volovik GE |
| Source: NATURE Volume: 424 Issue: 6952 Pages: 1022-1025 Published: AUG 28 2003 |
| Times Cited: 87 References: 15 |
| Abstract: Hydrodynamic flow in classical and quantum fluids can be either laminar or turbulent. Vorticity in turbulent flow is often modelled with vortex filaments. While this represents an idealization in classical fluids, vortices are topologically stable quantized objects in superfluids. Superfluid turbulence(1) is therefore thought to be important for the understanding of turbulence more generally. The fermionic He-3 superfluids are attractive systems to study because their characteristics vary widely over the experimentally accessible temperature regime. Here we report nuclear magnetic resonance measurements and numerical simulations indicating the existence of sharp transition to turbulence in the B phase of superfluid He-3. Above 0.60T(c) (where T-c is the transition temperature for superfluidity) the hydrodynamics are regular, while below this temperature we see turbulent behaviour. The transition is insensitive to the fluid velocity, in striking contrast to current textbook knowledge of turbulence(2). Rather, it is controlled by an intrinsic parameter of the superfluid: the mutual friction between the normal and superfluid components of the flow, which causes damping of the vortex motion. |
| Document Type: Article |
| Language: English |
| Reprint Address: Volovik, GE (reprint author), Helsinki Univ Technol, Low Temp Lab, POB 2200, FIN-02015 Helsinki, Finland |
Addresses:
1. Helsinki Univ Technol, Low Temp Lab, FIN-02015 Helsinki, Finland
2. Osaka City Univ, Dept Phys, Sumiyoshi Ku, Osaka 5588585, Japan
3. Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands
4. PL Kapitsa Phys Problems Inst, Moscow 119334, Russia
5. LD Landau Theoret Phys Inst, Moscow 119334, Russia
6. Acad Sci Czech Republ, Inst Phys, Joint Low Temp Lab, Prague 18000, Czech Republic
7. Charles Univ, CR-18000 Prague, Czech Republic |
| Publisher: NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: 715QR |
| ISSN: 0028-0836 |
| DOI: 10.1038/nature01880 |
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