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Title: Vortex Multiplication in Applied Flow: A Precursor to Superfluid Turbulence

Abstract

A surface-mediated process is identified in {sup 3}He-B which generates vortices at a roughly constant rate. It precedes a faster form of turbulence where intervortex interactions dominate. This precursor becomes observable when vortex loops are introduced in low-velocity rotating flow at sufficiently low mutual friction dissipation at temperatures below 0.5T{sub c}. Our measurements indicate that the formation of new loops is associated with a single vortex interacting in the applied flow with the sample boundary. Numerical calculations show that the single-vortex instability arises when a helical Kelvin wave expands from a reconnection kink at the wall and then intersects again with the wall.

Authors:
; ;  [1];  [1];  [2];  [3]; ;  [4];  [5]
  1. Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT (Finland)
  2. (Russian Federation)
  3. Physikalisches Institut, Universitaet Bayreuth, D-95440 Bayreuth (Germany)
  4. Department of Physics, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558-8585 (Japan)
  5. Department of Physical Sciences, P.O. Box 3000, FIN-90014 University of Oulu, Oulu (Finland)
Publication Date:
OSTI Identifier:
20778727
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 8; Other Information: DOI: 10.1103/PhysRevLett.96.085301; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; FRICTION; HELIUM 3; LIQUIDS; PRECURSOR; SUPERFLUIDITY; TURBULENCE; VORTICES; WALLS

Citation Formats

Finne, A.P., Kopu, J., Krusius, M., Eltsov, V.B., Kapitza Institute for Physical Problems, Kosygina 2, 119334 Moscow, Eska, G., Haenninen, R., Tsubota, M., and Thuneberg, E.V. Vortex Multiplication in Applied Flow: A Precursor to Superfluid Turbulence. United States: N. p., 2006. Web. doi:10.1103/PHYSREVLETT.96.0.
Finne, A.P., Kopu, J., Krusius, M., Eltsov, V.B., Kapitza Institute for Physical Problems, Kosygina 2, 119334 Moscow, Eska, G., Haenninen, R., Tsubota, M., & Thuneberg, E.V. Vortex Multiplication in Applied Flow: A Precursor to Superfluid Turbulence. United States. doi:10.1103/PHYSREVLETT.96.0.
Finne, A.P., Kopu, J., Krusius, M., Eltsov, V.B., Kapitza Institute for Physical Problems, Kosygina 2, 119334 Moscow, Eska, G., Haenninen, R., Tsubota, M., and Thuneberg, E.V. Fri . "Vortex Multiplication in Applied Flow: A Precursor to Superfluid Turbulence". United States. doi:10.1103/PHYSREVLETT.96.0.
@article{osti_20778727,
title = {Vortex Multiplication in Applied Flow: A Precursor to Superfluid Turbulence},
author = {Finne, A.P. and Kopu, J. and Krusius, M. and Eltsov, V.B. and Kapitza Institute for Physical Problems, Kosygina 2, 119334 Moscow and Eska, G. and Haenninen, R. and Tsubota, M. and Thuneberg, E.V.},
abstractNote = {A surface-mediated process is identified in {sup 3}He-B which generates vortices at a roughly constant rate. It precedes a faster form of turbulence where intervortex interactions dominate. This precursor becomes observable when vortex loops are introduced in low-velocity rotating flow at sufficiently low mutual friction dissipation at temperatures below 0.5T{sub c}. Our measurements indicate that the formation of new loops is associated with a single vortex interacting in the applied flow with the sample boundary. Numerical calculations show that the single-vortex instability arises when a helical Kelvin wave expands from a reconnection kink at the wall and then intersects again with the wall.},
doi = {10.1103/PHYSREVLETT.96.0},
journal = {Physical Review Letters},
number = 8,
volume = 96,
place = {United States},
year = {Fri Mar 03 00:00:00 EST 2006},
month = {Fri Mar 03 00:00:00 EST 2006}
}