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Instability of trajectories of solid particles around vortex lines

Lookup NU author(s): Emeritus Professor Yuri Sergeev, Professor Carlo Barenghi, Dr Demosthenes Kivotides

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Abstract

Progress in implementing the particle image velocimetry visualization technique in liquid helium has stimulated interest in understanding the dynamics of micron-size solid particles in a superfluid. We show that at sufficiently low temperatures, in the limit of a pure superfluid, the trajectories of small, neutrally buoyant, solid particles are unstable and deviate from the trajectories of superfluid particles, even in the simplest case of the motion around a single stationary straight vortex line. The result also applies to classical Euler flows. The implications of this result for the visualization of turbulent superflow at very low temperatures are discussed. © 2006 The American Physical Society.

Publication metadata

Author(s): Sergeev YA, Barenghi CF, Kivotides D, Vinen WF

Publication type: Article

Publication status: Published

Journal: Physical Review B - Condensed Matter and Materials Physics

Year: 2006

Volume: 73

Issue: 5

Date deposited: 29/11/2013

ISSN (print): 1098-0121

ISSN (electronic): 1550-235X

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevB.73.052502

DOI: 10.1103/PhysRevB.73.052502

Notes:

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