In this paper, the velocity profile of the normal component in the stationary flow of turbulent superfluid helium inside a cylindrical channel is determined, making use of a one-fluid model with internal variables derived from Extended Thermodynamics. In the hypothesis of null barycentric velocity of the fluid (the so-called counterflow situation) it is seen that, in the presence of a sufficiently high vortex length density, the velocity profile of the normal component becomes very flat in the central region of the channel. Thus, a central flat profile of the normal fluid does not necessarily imply that the flow of the normal component is turbulent.
SALUTO, L., MONGIOVI', M.S., JOU, D. (2014). Longitudinal counterflow in turbulent liquid helium: velocity profile of the normal component. ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK, 65, 531-548 [10.1007/s00033-013-0372-7].
Longitudinal counterflow in turbulent liquid helium: velocity profile of the normal component
SALUTO, Lidia;MONGIOVI', Maria Stella;
2014-01-01
Abstract
In this paper, the velocity profile of the normal component in the stationary flow of turbulent superfluid helium inside a cylindrical channel is determined, making use of a one-fluid model with internal variables derived from Extended Thermodynamics. In the hypothesis of null barycentric velocity of the fluid (the so-called counterflow situation) it is seen that, in the presence of a sufficiently high vortex length density, the velocity profile of the normal component becomes very flat in the central region of the channel. Thus, a central flat profile of the normal fluid does not necessarily imply that the flow of the normal component is turbulent.File | Dimensione | Formato | |
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