Turbulence generated by vibrating wire resonators in superfluid 4He at low temperatures

Bradley, D. I.; Clubb, D. O.; Fisher, S. N.; Guénault, A. M.; Haley, R. P.; Matthews, Craig J.; Pickett, G. R.; Zaki, K.

doi:10.1007/s10909-005-2240-0

Cited by 43 publications

(38 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These data were taken at 7 mK and 1 bar (Color figure online) linear laminar regime at low velocities and the turbulent regime above the critical velocity. Furthermore, in some experiments it has also been observed that hysteresis is present in the critical velocity at which switching occurs between these two regimes, not only for forks [3] but also for vibrating wires [7,8] and oscillating spheres [9][10][11][12]. Away from the critical velocity region, the force-velocity relationship is predictable and reversible, but close to the change of regime the behaviour is much more interesting.…”

mentioning

confidence: 96%

Hysteresis, Switching and Anomalous Behaviour of a Quartz Tuning Fork in Superfluid 4He

et al. 2013

Self Cite

View full text Add to dashboard Cite

We have been studying the behaviour of commercial quartz tuning forks immersed in superfluid 4 He and driven at resonance. For one of the forks we have observed hysteresis and switching between linear and non-linear damping regimes at temperatures below 10 mK. We associate linear damping with pure potential flow around the prongs of the fork, and non-linear damping with the production of vortex lines in a turbulent regime. At appropriate prong velocities, we have observed metastability of both the linear and the turbulent flow states, and a region of intermittency where the flow switched back and forth between each state. For the same fork, we have also observed anomalous behaviour in the linear regime, with large excursions in both damping, resonant frequency, and the tip velocity as a function of driving force.

show abstract

mentioning

confidence: 96%

Hysteresis, Switching and Anomalous Behaviour of a Quartz Tuning Fork in Superfluid 4He

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…In superfluid 4 He, free vortex rings disturb the vibration of a wire, decreasing the critical velocity of turbulence [16]. This result implies that vortex rings might trigger a transition to turbulence.…”

mentioning

confidence: 99%

“…It has been reported that free vortex rings can affect the vibration of a wire in superfluids [13,16]. In superfluid 4 He, free vortex rings disturb the vibration of a wire, decreasing the critical velocity of turbulence [16].…”

mentioning

confidence: 99%

Turbulence in Boundary Flow of SuperfluidHe4Triggered by Free Vortex Rings

et al. 2008

View full text Add to dashboard Cite

“…The device was designed to allow measurements at arbitrary frequencies by using a high frequency probe current and pick-up coils to measure the wire position [24]. A similar device was recently used to probe the frequency dependence of grid turbulence [25] in superfluid 4 He. Here we describe measurements using conventional vibrating wire techniques [18,26,27] at the resonant frequency of the wire.…”

Section: Methodsmentioning

confidence: 99%

“…In recent years there have been many investigations of quantum turbulence in superfluid 4 He using quartz tuning forks [1,2], oscillating microspheres [3] and vibrating wire resonators [4,5]. Vibrating wire resonators are particularly useful for studying quasiparticle excitations [6,7] and quantum turbulence [8][9][10][11][12] in superfluid 3 He.…”

Section: Introductionmentioning

confidence: 99%

Anomalous Damping of a Low Frequency Vibrating Wire in Superfluid 3He-B due to Vortex Shielding

et al. 2013

Self Cite

View full text Add to dashboard Cite

We have investigated the behaviour of a large vibrating wire resonator in the B-phase of superfluid 3 He at zero pressure and at temperatures below 200 µK. The vibrating wire has a low resonant frequency of around 60 Hz. At low velocities the motion of the wire is impeded by its intrinsic (vacuum) damping and by the scattering of thermal quasiparticle excitations. At higher velocities we would normally expect the motion to be further damped by the creation of quasiparticles from pair-breaking. However, for a range of temperatures, as we increase the driving force we observe a sudden decrease in the damping of the wire. This results from a reduction in the thermal damping arising from the presence of quantum vortex lines generated by the wire. These vortex lines Andreev-reflect low energy excitations and thus partially shield the wire from incident thermal quasiparticles.

show abstract

Turbulence generated by vibrating wire resonators in superfluid 4He at low temperatures

Cited by 43 publications

References 9 publications

Hysteresis, Switching and Anomalous Behaviour of a Quartz Tuning Fork in Superfluid 4He

Hysteresis, Switching and Anomalous Behaviour of a Quartz Tuning Fork in Superfluid 4He

Turbulence in Boundary Flow of SuperfluidHe4Triggered by Free Vortex Rings

Anomalous Damping of a Low Frequency Vibrating Wire in Superfluid 3He-B due to Vortex Shielding

Contact Info

Product

Resources

About