In this paper we show an exact solution (Kelvin wave) of an approximated dynamical equation for a quantized vortex line in helium superfluid at finite temperature. It is shown that the applied heat flux interacts with the vortex line, and the amplitude of the Kelvin wave can grow (the so-called Donnelly instability) or decrease according with the mutual direction between heat flux and wave vector.
BRUGARINO, T., MONGIOVI', M.S., SCIACCA, M. (2013). Nonlinear Kelvin waves on a quantized vortex line in superfluid helium. In Bollettino di matematica pura ed applicata (pp. 71-82). ROMA : ARACNE.
Nonlinear Kelvin waves on a quantized vortex line in superfluid helium
BRUGARINO, Tommaso;MONGIOVI', Maria Stella;SCIACCA, Michele
2013-01-01
Abstract
In this paper we show an exact solution (Kelvin wave) of an approximated dynamical equation for a quantized vortex line in helium superfluid at finite temperature. It is shown that the applied heat flux interacts with the vortex line, and the amplitude of the Kelvin wave can grow (the so-called Donnelly instability) or decrease according with the mutual direction between heat flux and wave vector.
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