Vortex dynamics in rotating counterflow and plane Couette and Poiseuille turbulence in superfluid helium
- Autori: Jou, D.; Sciacca, M.; Mongiovi', M.
- Anno di pubblicazione: 2008
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: superfluid turbulence; quantum vortices; coflow and counterflow
- OA Link: http://hdl.handle.net/10447/38522
Abstract
An equation previously proposed to describe the evolution of vortex-line density in rotating counterflow turbulent tangles in superfluid helium Phys. Rev B 69, 094513 2004 is generalized to incorporate nonvanishing barycentric velocity and velocity gradients. Our generalization is compared with an analogous approach proposed by Lipniacki Eur. J. Mech. B Fluids 25, 435 2006, and with experimental results by Swanson et al. Phys. Rev. Lett. 50, 190 1983 in rotating counterflow, and it is used to evaluate the vortex density in plane Couette and Poiseuille flows of superfluid helium.