12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Shear Flow and Kelvin-Helmholtz Instability in ...
View graph of relations

« Back

Shear Flow and Kelvin-Helmholtz Instability in Superfluids

Research output: Contribution to journalJournal article

Published

  • R. Blaauwgeers
  • V. B. Eltsov
  • G. Eska
  • A. P. Finne
  • Richard P. Haley
  • M. Krusius
  • J. J. Ruohio
  • L. Skrbek
  • G. E. Volovik
???articleNumber???155301
Journal publication date20/09/2002
JournalPhysical Review Letters
Journal number15
Volume89
Number of pages4
Original languageEnglish

Abstract

The first realization of instabilities in the shear flow between two superfluids is examined. The interface separating the A and B phases of superfluid 3He is magnetically stabilized. With uniform rotation we create a state with discontinuous tangential velocities at the interface, supported by the difference in quantized vorticity in the two phases. This state remains stable and nondissipative to high relative velocities, but finally undergoes an instability when an interfacial mode is excited and some vortices cross the phase boundary. The measured properties of the instability are consistent with the classic Kelvin-Helmholtz theory when modified for two-fluid hydrodynamics.

Bibliographic note

First observation of the Helmholtz instability in a condensate interface, also providing a key technique used in later studies of superfluid turbulence in rotating cryostats. A Helsinki-Lancaster collaboration. Haley was an EU-funded visitor provided essential experimental expertise developed in Lancaster. 28 citations. RAE_import_type : Journal article RAE_uoa_type : Physics