Advertisement

Journal of Low Temperature Physics

, Volume 103, Issue 3–4, pp 139–157 | Cite as

Multiple discrete TI states of superfluid turbulence

  • J. Castiglione
  • J. T. Tough
Articles

Abstract

We report a most unusual new observation in thermal counterflow of liquid helium II in a weakly nonuniform circular channel: the appearance of multiple discrete states of superfluid turbulence. These states are in the TI regime of heat currents but exhibit a lower level of dissipation than the ordinary TI state present in both uniform and nonuniform channels. Interestingly, these new states are only observed for diverging heat flow and are completely suppressed in converging flow. In contrast to the ordinary stable TI state, these new states are metastable. Transitions between the metastable states and to the TI state can be induced by weak mechanical perturbation. We have observed as many as five discrete metastable states at 1.75 K, but the number of states decreases markedly with temperature. Confirmatory data were obtained with a second channel of different size and shape. Although current theories of superfluid turbulence do not provide any obvious explanations for these new states, we offer some speculations based upon competing normal fluid flow profiles and a quantized vortex mill.

Keywords

Vortex Metastable State Liquid Helium Flow Profile Heat Current 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    P. J. Murphy, J. Castiglione, and J. T. Tough,J. Low Temp. Phys. 92, 307 (1993).Google Scholar
  2. 2.
    J. Castiglione, P. J. Murphy, J. T. Tough, F. Hayot, and Y. Pomeau,J. Low Temp. Phys. 100, 575 (1995).Google Scholar
  3. 3.
    J. T. Tough,Progress in Low Temperature Physics (Vol. VIII), D. F. Brewer, ed. (North-Holland, Amsterdam, 1982), p. 133.Google Scholar
  4. 4.
    K. W. Schwarz,Phys. Rev. B 38, 2398 (1988).Google Scholar
  5. 5.
    W. F. Vinen,Proc. R. Soc. London Sect. A 240, 128 (1957); W. F. Vinen,Proc. R. Soc. London Sect. A 243, 400 (1957); D. F. Brewer and D. O. Edwards,Phil. Mag. 6, 775 (1961); D. F. Brewer and D. O. Edwards,Phil. Mag. 7, 721 (1962).Google Scholar
  6. 6.
    J. D. Henberger and J. T. Tough,Phys. Rev. B 23, 413 (1981); R. K. Childers and J. T. Tough,Phys. Rev. B 13, 1040 (1976).Google Scholar
  7. 7.
    R. A. Ashton, L. B. Opatowsky, and J. T. Tough,Phys. Rev. Lett. 46, 658 (1981); W. de Haas and H. van Beelen,Physica B 83, 129 (1976).Google Scholar
  8. 8.
    S. S. Courts and J. T. Tough,Phys. Rev. B 39, 8924 (1989); S. S. Courts and J. T. Tough,Phys. Rev. B 38, 74 (1988); R. P. Slegtenhorst, G. Marees, and H. van Beelen,Physica B 113, 367 (1982): G. Marees, P. J. M. van der Slot, and H. van Beelen,Physica B 144, 209 (1987).Google Scholar
  9. 9.
    D. R. Ladner and J. T. Tough,Phys. Rev. B 17, 1455 (1978).Google Scholar
  10. 10.
    J. F. Kalkalidis, G. Klinich III, and J. T. Tough.Phys. Rev. B 50, 15909 (1994).Google Scholar
  11. 11.
    D. D. Awschalom, F. P. Milliken, and K. W. Schwarz,Phys. Rev. Lett. 53, 1372 (1984).Google Scholar
  12. 12.
    R. T. Wang, C. E. Swanson, and R. J. Donnelly,Phys. Rev. B 36, 5240 (1987).Google Scholar
  13. 13.
    W. F. Vinen,Proc. R. Soc. London Sect. A 242, 493 (1957).Google Scholar
  14. 14.
    R. G. K. M. Aarts and A. T. A. M. de Waele,Phys. Rev. B 50, 10069 (1994).Google Scholar
  15. 15.
    J. Castiglione, PhD thesis, The Ohio State University (1996).Google Scholar
  16. 16.
    R. K. Childers and J. T. Tough,J. Low Temp. Phys. 15, 63 (1974).Google Scholar
  17. 17.
    K. W. Schwarz,Phys. Rev. Lett. 64, 1130 (1990).Google Scholar
  18. 18.
    K. W. Schwarz,Phys. Rev. Lett. 47, 251 (1981).Google Scholar

Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • J. Castiglione
    • 1
  • J. T. Tough
    • 1
  1. 1.Department of PhysicsThe Ohio State UniversityColumbus

Personalised recommendations