Vortex Pinning to a Solid Sphere in Helium II

Fujiyama, Shoji; Hänninen, Risto; Tsubota, Makoto

doi:10.1007/s10909-007-9385-y

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…The problem of particlevortex interaction can be tackled at different levels of approximation. At the most microscopic level [11][12][13][14][15][16] , the close interaction of particle and vortex and the trapping of the particle onto the vortex require the calculation of a complex system of image vortices (mathematically, trapping is the reconnection of the vortex with its own image inside the particle). Furthermore, the particles of hydrogen are of irregular and unknown shape, so that this kind of calculation is hardly relevant in practice.…”

Section: Introductionmentioning

confidence: 99%

Velocity distributions of tracer particles in thermal counterflow in superfluid4He

et al. 2013

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Quantum turbulence accompanying thermal counterflow in superfluid 4 He was recently visualized by the Maryland group, using micron-sized tracer particles of solid hydrogen (J. Phys. Soc. Jpn. 77, 111007 (2008)) . In order to understand the observations we formulate the coupled dynamics of fine particles and quantized vortices, in the presence of a relative motion of the normal and superfluid components. Numerical simulations based on this formulation are shown to agree reasonably well with experimental observations of the velocity distributions of the tracer particles in thermal counterflow.

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Section: Introductionmentioning

confidence: 99%

Velocity distributions of tracer particles in thermal counterflow in superfluid4He

et al. 2013

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“…Notable examples include Poole et al's (2005) discussion of the motions of particles in the context of the equations of particle motion. Fujiyama et al (2007) demonstrates the pinning of quantized vortices by solid spheres, an interaction explored further by Kivotides et al (2008). Barenghi and Sergeev (2009) and Bewley and Sreenivasan (2009) consider the influence of bound particles on quantized vortex dynamics.…”

Section: B Recent Historymentioning

confidence: 99%

The journey of hydrogen to quantized vortex cores

Bewley

Vollmer

2013

Phys. Scr.

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Nanoscale hydrogen particles in superfluid helium track the motions of quantized vortices. This provides a way to visualize turbulence in the superfluid. Here, we trace the evolution of the hydrogen from a gas to frozen particles migrating toward the cores of quantized vortices. Not only are the intervening processes interesting in their own right, but understanding them better leads to more revealing experiments.

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