Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Shear Flow and Kelvin-Helmholtz Instability in Superfluids
AU - Blaauwgeers, R.
AU - Eltsov, V. B.
AU - Eska, G.
AU - Finne, A. P.
AU - Haley, Richard P.
AU - Krusius, M.
AU - Ruohio, J. J.
AU - Skrbek, L.
AU - Volovik, G. E.
N1 - 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
PY - 2002/9/20
Y1 - 2002/9/20
N2 - 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.
AB - 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.
KW - A-PHASE
KW - B-PHASE
KW - HE-3
KW - TRANSITION
KW - NUCLEATION
KW - VORTEX
U2 - 10.1103/PhysRevLett.89.155301
DO - 10.1103/PhysRevLett.89.155301
M3 - Journal article
VL - 89
JO - Physical review letters
JF - Physical review letters
IS - 15
M1 - 155301
ER -