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Journal of Low Temperature Physics

, Volume 148, Issue 3–4, pp 305–310 | Cite as

Quantum Turbulence Generated and Detected by a Vibrating Quartz Fork

  • M. Blažková
  • M. Človečko
  • E. Gažo
  • L. Skrbek
  • P. Skyba
Article

Abstract

Flow due to a commercially available vibrating quartz fork is studied in gaseous helium, He I, He II and 3He–B, over a wide range of temperatures and pressures. On increasing the driving force, the flow changes in character from laminar (characterized by a linear velocity versus drive dependence) to turbulent (characterized by a square root velocity versus drive dependence). In classical fluids, we characterize this transition by a critical Reynolds number, Re c =U cr δ/ν, where U cr is the critical velocity, ν stands for the kinematic viscosity, \(\delta=\sqrt{2\nu/\omega}\) is the viscous penetration depth and ω is the angular frequency of oscillations. U cr of order 10 cm/s observed in He II and 1 mm/s in 3He–B agree with those found with other vibrating objects such as spheres, wires and grids, as well as with available numerical simulations of vortex motion in an applied ac flow.

PACS

47.80.-v 47.27.Cn 67.40.Vs 85.50.-n 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • M. Blažková
    • 1
  • M. Človečko
    • 2
  • E. Gažo
    • 2
  • L. Skrbek
    • 3
  • P. Skyba
    • 2
  1. 1.Institute of Physics ASCRPragueCzech Republic
  2. 2.Center of Low Temperature PhysicsInstitute of Experimental PhysicsKošiceSlovakia
  3. 3.Faculty of Mathematics and PhysicsCharles UniversityPragueCzech Republic

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