168 citations · 841 across the 39 of their papers we have counts for
7 papers · 1 filter
Fixed points, stability and intermittency in a shell model for advection of passive scalars
Julien Kockelkoren, Mogens H. Jensen
We investigate the fixed points of a shell model for the turbulent advection of passive scalars introduced Jensen, Paladin and Vulpiani. The passive scalar field is driven by the v…
Pulses in the Zero-Spacing Limit of the GOY Model
K. H. Andersen, T. Bohr, M. H. Jensen +2
We study the propagation of localised disturbances in a turbulent, but momentarily quiescent and unforced shell model (an approximation of the Navier-Stokes equations on a set of e…
Multiscaling and Structure Functions in Turbulence: An Alternative Approach
Mogens H. Jensen
We propose an alternative formulation of structure functions for the velocity field in fully developed turbulence. Instead of averaging moments of the velocity differences as a fun…
Bursts and Shocks in a Continuum Shell Model
K. H. Andersen, T. Bohr, M. H. Jensen +1
We study a "burst" event, i. e. the evolution of an initial condition having support only in a finite interval of k-space, in the continuum shell model due to Parisi. We show that…
Chaotic Behavior in Shell Models and Shell Maps
Julien Kockelkoren, Fridolin Okkels, Mogens H. Jensen
We study the chaotic behavior of the ``GOY'' shell model by measuring the variation of the maximal Lyapunov exponent with the parameter which determines the nature of the secon…
Dynamical Organization around Turbulent Bursts
Fridolin Okkels, Mogens H. Jensen
The detailed dynamics around intermittency bursts is investigated in turbulent shell models. We observe that the amplitude of the high wave number velocity modes vanishes before ea…
Directed Percolation Universality in Asynchronous Evolution of Spatio-Temporal Intermittency
Juri Rolf, Tomas Bohr, Mogens H. Jensen
We present strong evidence that a coupled-map-lattice model for spatio-temporal intermittency belongs to the universality class of directed percolation when the updating rules are…