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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



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


DOI: 10.1103/PhysRevB.73.052502



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