Ganshin, A. N. and Efimov, V. B. and Kolmakov, G. V. and Mezhov-Deglin, L. P. and McClintock, P. V. E. (2010) Experiments on wave turbulence : the evolution and growth of second sound acoustic turbulence in superfluid 4He confirm self-similarity. New Journal of Physics, 12. 083047. ISSN 1367-2630
Abstract
We report our experiments on the formation of second sound acoustic turbulence in superfluid 4He. The initial growth in spectral amplitude follows power laws that steepen rapidly with increasing harmonic number n, corresponding to a propagating front in frequency space. The lower growth exponents agree well with analytic predictions and numerical modeling. The observed increase in the formation delay with n validates the concept of selfsimilarity in the growth of wave turbulence.