Kelvin-Helmholtz instability of AB interface in superfluid He 3

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-02-11
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Language
en
Pages
1-14
Series
Physical Review B, Volume 99, issue 5
Abstract
The Kelvin-Helmholtz instability is well known in classical hydrodynamics where it explains the sudden emergence of interfacial surface waves as a function of the flow velocity parallel to the interface. It can be carried over to the inviscid two-fluid dynamics of superfluids, to describe the stability of the phase boundary separating two bulk phases of superfluid He3 in rotating flow when the boundary is localized with a magnetic-field gradient. The results from extensive measurements as a function of temperature and pressure confirm that in the superfluid the classic condition for stability is changed and that the magnetic polarization of the B phase at the phase boundary has to be taken into account, which yields the magnetic-field-dependent interfacial surface tension.
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Eltsov , V B , Gordeev , A & Krusius , M 2019 , ' Kelvin-Helmholtz instability of AB interface in superfluid He 3 ' , Physical Review B , vol. 99 , no. 5 , 054104 , pp. 1-14 . https://doi.org/10.1103/PhysRevB.99.054104