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8 papers · 1 filter
Physics for the environment and sustainable development
Jürgen Kurths, Ankit Agarwal, Ugur Öztürk +3
A reliable understanding of the Earth system is essential for the life quality of modern society. Natural hazards are the cause of most life and resource losses. The ability to def…
Twenty-five years of multifractals in fully developed turbulence: a tribute to Giovanni Paladin
G. Boffetta, A. Mazzino, A. Vulpiani
The paper {\it On the multifractal nature of fully developed turbulence and chaotic systems}, by R. Benzi {\it et al.} published in this journal in 1984 (vol {\bf 17}, page 3521) h…
Point-source scalar turbulence
Antonio Celani, Marco Martins Afonso, Andrea Mazzino
The statistics of a passive scalar randomly emitted from a point source is investigated analytically. Our attention has been focused on the two-point equal-time scalar correlation…
On the scaling properties of 2d randomly stirred Navier--Stokes equation
Andrea Mazzino, Paolo Muratore-Ginanneschi, Stefano Musacchio
We inquire the scaling properties of the 2d Navier-Stokes equation sustained by a forcing field with Gaussian statistics, white-noise in time and with power-law correlation in mome…
Coarse-grained description of a passive scalar
Antonio Celani, Marco Martins Afonso, Andrea Mazzino
The issue of the parameterization of small-scale dynamics is addressed in the context of passive-scalar turbulence. The basic idea of our strategy is to identify dynamical equation…
Does multifractal theory of turbulence have logarithms in the scaling relations?
Uriel Frisch, Marco Martins Afonso, Andrea Mazzino +1
The multifractal theory of turbulence uses a saddle-point evaluation in determining the power-law behaviour of structure functions. Without suitable precautions, this could lead to…