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Liquid helium flows around an oscillating cylinder
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In this paper, the complementary flows of normal viscous liquid helium (He I) and of superfluid helium(He II) around an oscillating obstacle, of rectangular cross-section, have been studied experimentally by using the particle tracking velocimetry technique, with solid deuterium particles.Abstract:
The complementary flows of normal viscous liquid helium (He I) and of superfluid helium (He II) around an oscillating obstacle, of rectangular cross-section, have been studied experimentally by using the particle tracking velocimetry technique, with solid deuterium particles. The observed particle behaviour in He II is very similar to that seen in He I. It seems therefore that, without some kind of special forcing acting differently on each superfluid helium component, on length scales which the experiment can access, the oscillating quantum flow mimics the classical one.read more
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TL;DR: In this paper, the Lagrangian dynamics of solid deuterium particles of size is investigated by using the particle tracking velocimetry technique, and the normalized probability distribution of the particle velocity changes from the power-law shape typical of quantum turbulence, at scales, to the nearly Gaussian form typical of classical turbulent flows, at.