Frequency Dependence of the Critical Velocity of a Sphere Oscillating in Superfluid Helium-4

2008/01/16 by Risto Hänninen, R. Hänninen, Hänninen, R. +2
Engineering · Physics and Astronomy · #FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #Quantum, superfluid, helium dynamics #Superconducting Materials and Applications #cond-mat.other

paper · pdf · doi:10.48550/arxiv.0801.2521

3 pages, 1 figure

arxiv created 2008/01/16 · openalex publication_date 2008/01/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

It is shown that the critical velocity of a small sphere oscillating in superfluid helium increases with the square root of the oscillation frequency. This behavior can be described by a simple dimensional argument. The size of the sphere and the temperature of the superfluid are found to have no or only very little effect. Surface properties of the sphere and remanent vorticity may have an influence but have not been under systematic investigation in these measurements

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