231 citations · 3.4k across the 84 of their papers we have counts for
9 papers · 1 filter
Energy transfer in Hall-MHD turbulence: cascades, backscatter, and dynamo action
P. D. Mininni, A. Alexakis, A. Pouquet
Scale interactions in Hall MHD are studied using both the mean field theory derivation of transport coefficients, and direct numerical simulations in three space dimensions. In the…
On the inverse cascade of magnetic helicity
Alexandros Alexakis, Pablo Mininni, Annick Pouquet
We study the inverse cascade of magnetic helicity in conducting fluids by investigating the detailed transfer of helicity between different spherical shells in Fourier space in dir…
Inertial Range Scaling, Karman-Howarth Theorem and Intermittency for Forced and Decaying Lagrangian Averaged MHD in 2D
J. Pietarila Graham, D. D. Holm, P. Mininni +1
We present an extension of the Karman-Howarth theorem to the Lagrangian averaged magnetohydrodynamic (LAMHD-alpha) equations. The scaling laws resulting as a corollary of this theo…
The imprint of large-scale flows on turbulence
A. Alexakis, P. D. Mininni, A. Pouquet
We investigate the locality of interactions in hydrodynamic turbulence using data from a direct numerical simulation on a grid of 1024^3 points; the flow is forced with the Taylor-…
Geophysical-astrophysical spectral-element adaptive refinement (GASpAR): Object-oriented h-adaptive code for geophysical fluid dynamics simulation
Duane Rosenberg, Aime' Fournier, Paul Fischer +1
We present an object-oriented geophysical and astrophysical spectral-element adaptive refinement (GASpAR) code for application to turbulent flows. Like most spectral-element codes,…
Cancellation exponent and multifractal structure in two-dimensional magnetohydrodynamics: direct numerical simulations and Lagrangian averaged modeling
Jonathan Pietarila-Graham, Pablo D. Mininni, Annick Pouquet
We present direct numerical simulations and Lagrangian averaged (also known as alpha-model) simulations of forced and free decaying magnetohydrodynamic turbulence in two dimensions…