Search Results - "Plunian, F."

Transition from large-scale to small-scale dynamo by Ponty, Y, Plunian, F

“…The dynamo equations are solved numerically with a helical forcing corresponding to the Roberts flow. In the fully turbulent regime the flow behaves as a…”
Get full text

Torsional Alfvén waves in a dipolar magnetic field: experiments and simulations by Tigrine, Z, Nataf, H-C, Schaeffer, N, Cardin, P, Plunian, F

“…The discovery of torsional Alfvén waves (geostrophic Alfvén waves) in the Earth’s core (Gillet et al. 2010) calls for a better understanding of their…”
Get full text

A non-local shell model of hydrodynamic and magnetohydrodynamic turbulence by Plunian, F, Stepanov, R

“…We derive a new shell model of magnetohydrodynamic (MHD) turbulence in which the energy transfers are not necessarily local. Like the original MHD equations,…”
Get full text

Helical shell models for MHD by Lessinnes, T., Plunian, F., Carati, D.

“…A shell model for magnetohydrodynamics (MHD) is derived directly from the dynamical system driving the evolution of three helical modes interacting in a triad…”
Get full text

Impact of impellers on the axisymmetric magnetic mode in the VKS2 dynamo experiment by Laguerre, R, Nore, C, Ribeiro, A, Léorat, J, Guermond, J-L, Plunian, F

“…In the von Kármán Sodium 2 (VKS2) successful dynamo experiment of September 2006, the observed magnetic field showed a strong axisymmetric component, implying…”
Get full text

Influence of inner and outer walls electromagnetic properties on the onset of a stationary dynamo by AVALOS-ZUNIGA, R, PLUNIAN, F

“…To study the onset of a stationary dynamo in the presence of inner or outer walls of various electromagnetic properties, we propose a simple 1D-model in which…”
Get full text

Generation of axisymmetric modes in cylindrical kinematic mean-field dynamos of VKS type by Giesecke, A., Nore, C., Plunian, F., Laguerre, R., Ribeiro, A., Stefani, F., Gerbeth, G., Léorat, J., Guermond, J.-L.

“…In an attempt to understand why the dominating magnetic field observed in the von-Kármán-sodium (VKS) dynamo experiment is axisymmetric, we investigate in the…”
Get full text

Chaotic behaviour of the Rikitake dynamo with symmetric mechanical friction and azimuthal currents by Plunian, F., Marty, Ph, Alemany, A.

“…We propose a new description of the two–disc dynamo, considering azimuthal currents in the rotating discs, as proposed by H. K. Moffatt for the one–disc…”
Get full text

Cylindrical anisotropic α 2 dynamos by Avalos-Zuñiga, R., Xu, M., Stefani, F., Gerbeth, G., Plunian, F.

“…We explore the influence of geometry variations on the structure and the time-dependence of the magnetic field that is induced by kinematic α 2 dynamos in a…”
Get full text

Subharmonic Dynamo Action in the Roberts Flow by Plunian, F., Rädler, K.-H.

“…The paper deals with the dynamo action of the Roberts flow, that is, a flow depending periodically on two cartesian coordinates, X and Y , but being…”
Get full text

Deciphering solar turbulence from sunspots records by Plunian, F., Sarson, G. R., Stepanov, R.

“…It is generally believed that sunspots are the emergent part of magnetic flux tubes in the solar interior. These tubes are created at the base of the…”
Get full text

Deciphering solar turbulence from sunspots records by Plunian, F., Sarson, G. R., Stepanov, R.

Get full text

Erratum: Impact of Impellers on the Axisymmetric Magnetic Mode in the VKS2 Dynamo Experiment [Phys. Rev. Lett. 101 , 104501 (2008)] by Laguerre, R., Nore, C., Ribeiro, A., Léorat, J., Guermond, J.-L., Plunian, F.

Get full text

Fully developed turbulent dynamo at low magnetic Prandtl numbers by Stepanov, Rodion, Plunian, Franck

“…We investigate the dynamo problem in the limit of small magnetic Prandtl number (Pm) using a shell model of magnetohydrodynamic turbulence. The model is…”
Get full text

Rossby waves and α-effect by Avalos-Zuniga, R., Plunian, F., Rädler, K. H.

“…Rossby waves drifting in the azimuthal direction are a common feature at the onset of thermal convective instability in a rapidly rotating spherical shell…”
Get full text

Cylindrical anisotropic $\alpha^{2}$ dynamos by Avalos-Zuñiga, R., Xu, M., Stefani, F., Gerbeth, G., Plunian, F.

“…We explore the influence of geometry variations on the structure and the time-dependence of the magnetic field that is induced by kinematic $\alpha^{2}$…”
Get full text

Influence of inner and outer walls electromagnetic properties on the onset of a stationary dynamo by Avalos-Zuniga, R, Plunian, F

“…To study the onset of a stationary dynamo in the presence of inner or outer walls of various electromagnetic properties, we propose a simple 1D-model in which…”
Get full text

Harmonic and subharmonic solutions of the Roberts dynamo problem. Application to the Karlsruhe experiment by Plunian, F, Radler, K. -H

“…Vol. 38, No. 1/2, 95-106, 2002 Two different approaches to the Roberts dynamo problem are considered. Firstly, the equations governing the magnetic field are…”
Get full text

Influence of electromagnetic boundary conditions onto the onset of dynamo action in laboratory experiments by Avalos-Zuniga, R, Plunian, F

“…Phys. Rev. E 68, 066307 (2003) We study the onset of dynamo action of the Riga and Karlsruhe experiments with the addition of an external wall, the…”
Get full text

A non local shell model of turbulent dynamo by Plunian, F, Stepanov, R

“…We derive a new shell model of magnetohydrodynamic (MHD) turbulence in which the energy transfers are not necessary local. Like the original MHD equations, the…”
Get full text