Experiments on wave turbulence: the evolution and growth of second sound acoustic turbulence in superfluid 4He confirm self-similarity

Details Experiments on wave turbulence: the evolution and growth of second sound acoustic turbulence in superfluid 4He confirm self-similarity Experiments on wave turbulence: the evolution and growth of second sound acoustic turbulence in superfluid 4He confirm self-similarity

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12h3047g&link_type=abstract

New Journal of Physics, Volume 12, Issue 8, pp. 083047 (2010).

Physics

1

Scientific paper

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 self-similarity in the growth of wave turbulence.

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