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Can Superfluid Vortex Lines Excite Normal Fluid Turbulence in 4He?

Lookup NU author(s): Professor Carlo Barenghi, Dr Demosthenes Kivotides, Dr Sola Idowu, Dr David Samuels

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Abstract

When helium II is made turbulent the superfluid component forms a dense tangle of quantized vortex lines which can be easily detected experimentally using the second sound technique. On the contrary little is known about the normal fluid component: on the experimental side progress has been hindered by the lack of simple flow visualization, and on the theoretical side attention has been concentrated on the effect that a given normal flow has on the superfluid vortices, not vice-versa. Attempting to fill this gap, we discuss results of recent calculations in which we find that normal fluid vorticity structures can be generated by superfluid vortices. In particular we address the issue of whether the superfluid vortices can make the normal fluid turbulent.

Publication metadata

Author(s): Barenghi CF, Kivotides D, Idowu OC, Samuels DC

Publication type: Article

Publication status: Published

Journal: Journal of Low Temperature Physics

Year: 2000

Volume: 121

Issue: 5-6

Pages: 377-386

ISSN (print): 0022-2291

ISSN (electronic): 1573-7357

Publisher: Springer New York LLC

URL: http://dx.doi.org/10.1023/A:1017541411509

DOI: 10.1023/A:1017541411509

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