Zobrazeno 1 - 10
of 147
pro vyhledávání: '"Politano, H."'
Autor:
Gibbon, J. D., Gupta, A., Krstulovic, G., Pandit, R., Politano, H., Ponty, Y., Pouquet, A., Sahoo, G., Stawarz, J.
Publikováno v:
Phys. Rev. E 93, 043104 (2016)
We build on recent developments in the study of fluid turbulence [Gibbon \textit{et al.} Nonlinearity 27, 2605 (2014)] to define suitably scaled, order-$m$ moments, $D_m^{\pm}$, of $\omega^\pm= \omega \pm j$, where $\omega$ and $j$ are, respectively,
Externí odkaz:
http://arxiv.org/abs/1508.03756
We present two models for turbulent flows with periodic boundary conditions and with either rotation, or a magnetic field in the magnetohydrodynamics (MHD) limit. One model, based on Lagrangian averaging, can be viewed as an invariant-preserving filt
Externí odkaz:
http://arxiv.org/abs/0904.4860
We test a subgrid-scale spectral model of rotating turbulent flows against direct numerical simulations. The particular case of Taylor-Green forcing at large scale is considered, a configuration that mimics the flow between two counter rotating disks
Externí odkaz:
http://arxiv.org/abs/0812.1821
We present a dynamical spectral model for Large Eddy Simulation of the incompressible magnetohydrodynamic (MHD) equations based on the Eddy Damped Quasi Normal Markovian approximation. This model extends classical spectral Large Eddy Simulations for
Externí odkaz:
http://arxiv.org/abs/0803.4499
Context : We present a self-consistent model of solar coronal heating, originally developed by Heyvaert & Priest (1992), in which we include the dynamical effect of the background magnetic field along a coronal structure by using exact results from w
Externí odkaz:
http://arxiv.org/abs/0712.2029
We investigate the locality or nonlocality of the energy transfer and of the spectral interactions involved in the cascade for decaying magnetohydrodynamic (MHD) flows in the presence of a uniform magnetic field $\bf B$ at various intensities. The re
Externí odkaz:
http://arxiv.org/abs/0708.0765
A three-dimensional numerical computation of magnetohydrodynamic dynamo behavior is described. The dynamo is mechanically forced with a driving term of the Taylor-Green type. The magnetic field development is followed from negligibly small levels to
Externí odkaz:
http://arxiv.org/abs/astro-ph/0412071
We present a three--pronged numerical approach to the dynamo problem at low magnetic Prandtl numbers $P_M$. The difficulty of resolving a large range of scales is circumvented by combining Direct Numerical Simulations, a Lagrangian-averaged model, an
Externí odkaz:
http://arxiv.org/abs/physics/0410046
Autor:
Sorriso-Valvo, L., Carbone, V., Abramenko, V., Yurchyshyn, V., Noullez, A., Politano, H., Pouquet, A., Veltri, P.
The observations of magnetic field variations as a signature of flaring activity is one of the main goal in solar physics. Some efforts in the past give apparently no unambiguous observations of changes. We observed that the scaling laws of the curre
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207244
A signed measure analysis of two-dimensional intermittent magnetohydrodynamic turbulence is presented. This kind of analysis is performed to characterize the scaling behavior of the sign-oscillating flow structures, and their geometrical properties.
Externí odkaz:
http://arxiv.org/abs/nlin/0111053