Second sound propagation in laminar and turbulent superfluid 4He via extended thermodynamics

  • Lucia Ardizzone


In this work, previous results on the complex propagation of second sound in laminar and turbulent superfluid $^4$He are reported. Furthermore the case of inhomogeneous superfluid turbulence is examined and, in particular, the wave propagation is investigated in the presence of an anisotropic vortex tangle. Two cases of physical interest are considered: wave front collinear and orthogonal to the heat flux.