FM 07-15; arXiv: 1508.01857, DOI 10.1007/978-3-319-29701-9;
in ``The Foundations of Chaos Revisited: From Poincar\'e to Recent Advancements'', ed. C. Skiadas, Series "Springer: Complexity", p.59-70, 2016.

Authors : Giovanni Gallavotti, Pedro Garrido

Title:: A hierarchical turbulence model. Comments on Ruelle's intermittency theory

Abstract: The comments are based on numerical calculations first done by P. Garrido and confirmed by G. Gallavotti. This is the text of our comments (requested by the organizers) to the talk by D. Ruelle at the CHAOS15 conference, Institut Henri Poincar\'e, Paris, May 26-29, 2015.

Keywords: Hierarchical model, Intermittency, Obukov-Kolmogorov theory, Ruelle theory

Giovanni Gallavotti
INFN Fisica, Rutgers University e Accademia dei Lincei
Universita di Roma Sapienza, 00185 Roma, Italy

Pedro Garrido
Physics Dept., University of Granada