231 citations · 3.4k across the 129 of their papers we have counts for
9 papers · 1 filter
Turbulent magnetic dynamo excitation at low magnetic Prandtl number
P. D. Mininni
Planetary and stellar dynamos likely result from turbulent motions in magnetofluids with kinematic viscosities that are small compared to their magnetic diffusivities. Laboratory e…
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-…
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…
Low magnetic Prandtl number dynamos with helical forcing
P. D. Mininni, D. C. Montgomery
We present direct numerical simulations of dynamo action in a forced Roberts flow. The behavior of the dynamo is followed as the mechanical Reynolds number is increased, starting f…
Shell to shell energy transfer in MHD, Part II: Kinematic dynamo
Pablo D. Mininni, Alexandros Alexakis, Annick Pouquet
We study the transfer of energy between different scales for forced three-dimensional MHD turbulent flows in the kinematic dynamo regime. Two different forces are examined: a non-h…
Shell to shell energy transfer in MHD, Part I: steady state turbulence
Alexandros Alexakis, Pablo D. Mininni, Annick Pouquet
We investigate the transfer of energy from large scales to small scales in fully developed forced three-dimensional MHD-turbulence by analyzing the results of direct numerical simu…