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Motion of micron-size particles in turbulent helium II

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

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Abstract

The surprising result of a recent experiment in turbulent helium II is that micron-size tracer particles move with about half the speed of the imposed normal fluid. We develop a theory of the interaction of small spheres with quantized vortices and predict that the particles' slip velocity (resulting from the balance of buoyancy and Stokes drag forces) must be corrected by an amount which is proportional to the normal fluid velocity, in quantitative agreement with the observations.

Publication metadata

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

Publication type: Article

Publication status: Published

Journal: Physical Review B

Year: 2006

Volume: 74

Issue: 18

ISSN (print): 1098-0121

ISSN (electronic): 1550-235X

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevB.74.184506

DOI: 10.1103/PhysRevB.74.184506

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