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Particles-Vortex Interactions and Flow Visualization in He-4

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

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Abstract

Recent experiments have demonstrated a remarkable progress in implementing and use of the Particle Image Velocimetry (PIV) and particle tracking techniques for the study of turbulence in He-4. However, an interpretation of the experimental data in the superfluid phase requires understanding how the motion of tracer particles is affected by the two components, the viscous normal fluid and the inviscid superfluid. Of a particular importance is the problem of particle interactions with quantized vortex lines which may not only strongly affect the particle motion, but, under certain conditions, may even trap particles on quantized vortex cores. The article reviews recent theoretical, numerical, and experimental results in this rapidly developing area of research, putting critically together recent results, and solving apparent inconsistencies. Also discussed is a closely related technique of detection of quantized vortices by negative ion bubbles in He-4.

Publication metadata

Author(s): Sergeev YA, Barenghi CF

Publication type: Review

Publication status: Published

Journal: Journal of Low Temperature Physics

Year: 2009

Volume: 157

Issue: 5-6

Pages: 429-475

ISSN (print): 0022-2291

ISSN (electronic): 1573-7357

URL: http://dx.doi.org/10.1007/s10909-009-9994-8

DOI: 10.1007/s10909-009-9994-8

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