Kelvin-Helmholtz Instability and Dissipation in a Phase-Separated 3He-4He Liquid Mixture

Burmistrov, S. N.; Dubovskii, L. B.; Satoh, Toshimi

doi:10.1007/s10909-005-2245-8

Cited by 5 publications

(3 citation statements)

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“…[15]. The KH instability has also been proposed as a tool to explore the interface of the superfluid dilute 3 He-4 He liquid mixture with its normal concentrated phase [16]. A flurry of theoretical investigations have appeared which recommend the KH instability as a means to study mixtures of different cold-atom Bose-Einstein condensates (see eg.…”

Section: Kh Instability In Superfluid 3 Hementioning

confidence: 99%

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Kelvin-Helmholtz instability of AB interface in superfluid He3

2019

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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 3 He 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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Section: Kh Instability In Superfluid 3 Hementioning

confidence: 99%

“…The data was collected in three separate measuring sessions within slightly differing temperature ranges, as indicated in the plot. The lines with slightly differing slopes display Eq (16)…”

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confidence: 99%

Kelvin-Helmholtz instability of AB interface in superfluid He3

2019

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“…The KH instability between nuclear superfluids in a neutron star has been proposed as the trigger for pulsar glitches [29]. It has also been discussed at the interfaces between the normal fluid and superfluid [30,31], between 3 He and 4 He [32], and the interface between two components of an immiscible binary BEC [19,33,34]. In these cases, the presence of two distinct fluids complicates the behaviour, including buoyancy effects [19] and a crossover to a counterflow instability if there is significant overlap of the fluids at the interface [34].…”

Section: Introductionmentioning

confidence: 99%

Kelvin-Helmholtz instability in a single-component atomic superfluid

Baggaley

Parker

2018

Phys. Rev. A

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We demonstrate an experimentally feasible method for generating the classical Kelvin-Helmholtz instability in a single component atomic Bose-Einstein condensate. By progressively reducing a potential barrier between two counter-flowing channels we seed a line of quantised vortices, which precede to form progressively larger clusters, mimicing the classical roll-up behaviour of the Kelvin-Helmholtz instability. This cluster formation leads to an effective superfluid shear layer, formed through the collective motion of many quantised vortices. From this we demonstrate a straightforward method to measure the effective viscosity of a turbulent quantum fluid in a system with a moderate number of vortices, within the range of current experimental capabilities. arXiv:1803.00277v1 [cond-mat.quant-gas]

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