Scaling and statistical geometry in passive scalar turbulence.
We show that the statistics of a turbulent passive scalar at scales larger than the pumping may exhibit multiscaling due to a weaker mechanism than the presence of statistical conservation laws. We develop a general formalism to give explicit predictions for the large scale scaling exponents in the case of the Kraichnan model and discuss their geometric origin at small and large scale.
Department of Physics, University of Genova, INFN and CNISM, via Dodecaneso 33, 16146 Genova, Italy.
Andrea
A
Mazzino
Paolo
P
Muratore-Ginanneschi