On the Transition from Potential Flow to Turbulence Around a Microsphere Oscillating in Superfluid $$^4\hbox {He}$$ 4 He

Acoustic Turbulence in Superfluid 4 He

Thermoviscous Effects in Steady and Oscillating Flow of Superfluid <Superscript>4</Superscript>He: Experiments

The correct interpretation of superfluid flow experiments relies on the knowledge of thermal and viscous effects that can cause deviations from ideal behavior. The previous paper presented a theoretical study of dissipative and reactivejnondissipative) thermoviscous effects in both steady and oscillating flow of an isotropic superfluid through small apertures and channels. Here, a detailed comp...

Superfluid 4 He weak links

Superfluid He weak links

Dispersion of Ripplons in Superfluid 4 He

A detailed study of the dispersion law of surface excitations in liquid 4He at zero temperature is presented, with special emphasis to the short wave length region. The hybridization mechanism between surface and bulk modes is discussed on a general basis, investigating the scattering of slow rotons from the surface. An accurate density functional, accounting for backflow effects, is then used ...

Measurement of Turbulence in Superfluid 3 He - B

The experimental investigation of superfluid turbulence in 3 He-B is generally not possible with the techniques which have been developed for 4 He-II. We describe a new method by which a transient burst of turbulent vortex expansion can be generated in 3 He-B. It is based on the injection of a few vortex loops into rotating vortex-free flow. The time-dependent evolution of the quantized vortici...